If you are DCAing small amounts, many txs, you better use to withdraw them as 1st step into a LN wallet. From there, when you can swap out to onchain anytime you feel comfortable with the amount. In this way you add also some degree of privacy.

I dont think it matters much

If you want slightly lower fees in future you might consolidate a few bytes

However utxos also pave the way for layer 2 contracts, and the older they are the harder to double spend

More utxos can also be a vector for privacy

So it comes down to personal preference

A little math:

Therefore, it would take ~18 days for all of these UTXOs to be spent just once, or added to a lightning channel.

For this reason, I don't like UTXOs that are smaller than 0.001 BTC. I don't want my outputs to be unspendable in the future.

I think it's less about the number of UTXOs, and more about how much each UTXO holds.

For example if you were a whale with a total of 1000 BTC, then splitting that into 50 UTXOs isn't going to cost you much in fees as a percentage.

But if you own like 0.1 BTC total, then splitting that into 50 UTXOs is a bad idea because you'd lose a big percentage of that when spending in a high fee environment.

For future proofing I prefer UTXOs to be at least 0.05 BTC.

i dont think the amount of utxos matter too much but if you have less than $10 in each one that could become a problem in the future if it start costing $1 or more to spend a UTXO. right now it cost $0.20 but its a bit busy

даже 3 уже много! нужно соединить сейчас... потом это может стоить очень дорого в долларе... пусть это 5000 сат но 500 доллар это много...