Chapter 1 of the book The Bitcoin Standard,

"Being an instrument of exchange is the quintessential function that defines money; in other words, it is not a good acquired to be consumed (a consumer good) nor to be used in the production of other goods (an investment, or capital good), but above all to be exchanged for other goods. "

Money has different functions and the use that is given to it depends on the function that we want to use it for. Bitcoin is money, so saving it, spending it or investing it will depend on what we need.

I understand that if we have money it is to use it, of course it is not to use it for the sake of using it as if it were currency in the Monopoly Game. It is used in its proper measure. If I have the possibility of buying useful and necessary things in BTC, I do it, if at some point I use it in a trade because of its volatility, I also do it and of course, I always go back to Bitcoin and save for the future.

What I do not do is USE IT AS A NON-SERIOUS ELEMENT. I DO NOT SPEND IT FOR PLEASURE, I DO NOT SELL IT ALL IN TRADING, ALWAYS A LITTLE AND THEN TO RECOVER AGAIN WHAT I HAVE SOLD WITH PROFITS IN BITCOIN. Save, if I save and if I can ACCUMULATE I buy everything I can and do all the PoW necessary to earn it.