Short answer: the word is not ownable for cryptocurrency, but that is about genericness, not about some blanket rule — and it means fake "Bitcoin" goods are a consumer-fraud problem, not a trademark problem.
1) Is "Bitcoin" trademarked?
There is no owner of the word for BTC or crypto services. You cannot get exclusive rights in the term as applied to Bitcoin itself, because it is the descriptive name of the thing.
It is a different story for unrelated goods, where "Bitcoin" is arbitrary. Word marks on the term have issued for goods that have nothing to do with the currency (for example audio/video recordings). Because trademark rights are granted per class of goods, such a registration gives its owner nothing over Bitcoin-the-currency. If you want to check a specific one, search the term in USPTO TSDR and read the goods/services field, not just the mark text.
2) Why it cannot be claimed for crypto
Two doctrines do the work:
Descriptiveness. Lanham Act §2(e)(1), 15 U.S.C. §1052(e)(1), refuses marks that are merely descriptive of the goods. A descriptive term can only be registered on the Principal Register with a disclaimer of the exclusive right to that word, or with proof of acquired distinctiveness under §2(f).
Genericness. A term that is the common name of the goods can never function as a trademark. Abercrombie & Fitch Co. v. Hunting World, Inc., 537 F.2d 4 (2d Cir. 1976) is the standard case setting out the spectrum from generic to fanciful; Kellogg Co. v. National Biscuit Co., 305 U.S. 111 (1938) is the classic authority that a name can pass into generic use and lose protection.
For "Bitcoin" as applied to bitcoin, both point the same way. The Bitcoin Foundation's own 2015 policy statement argued the word "should not be the intellectual property of any individual or entity" and compared it to terms like "dollar" and "euro". Applicants in the crypto space have generally been required to disclaim the word, and applications covering crypto services have been refused or abandoned on descriptiveness grounds.
3) Selling fake "Bitcoin" coins on Amazon
This is the interesting part: nobody can sue for infringement of the word, because nobody owns it in this context. That does not make it legal. It is ordinary consumer deception:
FTC Act §5, 15 U.S.C. §45 — unfair or deceptive acts or practices.
State UDAP statutes — e.g. Cal. Bus. & Prof. Code §17200, N.Y. Gen. Bus. Law §349.
Lanham Act §43(a), 15 U.S.C. §1125(a) — false designation of origin and false advertising. Note Lexmark Int'l v. Static Control Components, 572 U.S. 118 (2014): standing is limited to plaintiffs in the mark's zone of interests, which in practice means a competitor whose sales are diverted, not a member of the public and not "the Bitcoin community".
If the fake is sold as real BTC or as an investment, securities/commodities fraud and wire fraud, 18 U.S.C. §1343, can attach.
If the "gold" is not gold, the FTC's jewelry and precious-metals guides, 16 C.F.R. Part 23, apply directly.
Amazon can and does remove the listing under its own counterfeit/prohibited-products policies.
So the realistic chain of recourse is: FTC and state AGs, defrauded buyers, and the platform — not a trademark owner, because there isn't one.
Word vs logo
The word is the weak half and the logo is the strong half. A distinctive graphic can be protected even when the word cannot. The well-known ₿/rotated-B mark was published for free community use on Bitcointalk in 2010, and attempts to claim it as a private mark have been rejected — including a Spanish court decision annulling a registration covering the mark.
Practical takeaway: for anything crypto-related, treat "Bitcoin" as free for anyone to use and impossible to monopolise, which is exactly why the protection you actually get against fake "Bitcoin" products comes from consumer law and platform enforcement rather than from the brand.
Citations to check yourself: 15 U.S.C. §1052(e)(1) and §1125(a); Abercrombie, 537 F.2d 4; Kellogg, 305 U.S. 111; Lexmark, 572 U.S. 118; FTC jewelry guides at 16 C.F.R. Part 23; the Bitcoin Foundation's archived 2015 trademark policy.
Short answer: the word is not ownable for cryptocurrency, but that is about genericness, not about some blanket rule — and it means fake "Bitcoin" goods are a consumer-fraud problem, not a trademark problem.
1) Is "Bitcoin" trademarked?
There is no owner of the word for BTC or crypto services. You cannot get exclusive rights in the term as applied to Bitcoin itself, because it is the descriptive name of the thing.
It is a different story for unrelated goods, where "Bitcoin" is arbitrary. Word marks on the term have issued for goods that have nothing to do with the currency (for example audio/video recordings). Because trademark rights are granted per class of goods, such a registration gives its owner nothing over Bitcoin-the-currency. If you want to check a specific one, search the term in USPTO TSDR and read the goods/services field, not just the mark text.
2) Why it cannot be claimed for crypto
Two doctrines do the work:
For "Bitcoin" as applied to bitcoin, both point the same way. The Bitcoin Foundation's own 2015 policy statement argued the word "should not be the intellectual property of any individual or entity" and compared it to terms like "dollar" and "euro". Applicants in the crypto space have generally been required to disclaim the word, and applications covering crypto services have been refused or abandoned on descriptiveness grounds.
3) Selling fake "Bitcoin" coins on Amazon
This is the interesting part: nobody can sue for infringement of the word, because nobody owns it in this context. That does not make it legal. It is ordinary consumer deception:
So the realistic chain of recourse is: FTC and state AGs, defrauded buyers, and the platform — not a trademark owner, because there isn't one.
Word vs logo
The word is the weak half and the logo is the strong half. A distinctive graphic can be protected even when the word cannot. The well-known ₿/rotated-B mark was published for free community use on Bitcointalk in 2010, and attempts to claim it as a private mark have been rejected — including a Spanish court decision annulling a registration covering the mark.
Practical takeaway: for anything crypto-related, treat "Bitcoin" as free for anyone to use and impossible to monopolise, which is exactly why the protection you actually get against fake "Bitcoin" products comes from consumer law and platform enforcement rather than from the brand.
Citations to check yourself: 15 U.S.C. §1052(e)(1) and §1125(a); Abercrombie, 537 F.2d 4; Kellogg, 305 U.S. 111; Lexmark, 572 U.S. 118; FTC jewelry guides at 16 C.F.R. Part 23; the Bitcoin Foundation's archived 2015 trademark policy.