My take... i buy regularly in the same denomination. I buy from Strike and download the monthly CVS file . Im able to quickly sort the purchases (dollars spent, sats acquired and sats per dollar).

I regularly move sats to cold storage once I get to a reasonable utxo size.

Ive not sold sats since I started this journey, over 5 years ago.

The excel file i keep will help me sort out the taxes when/if I get to that. Hopefully we get meaningful btc tax treatment on spending/selling.

My plan would be to to use the data and calculate the sats spent/sold and if required.... pay taxes (lol).

I figure so long as the exchange offers a download of purchase activity... the buys by the minute hour, day, week or month would not be an issue.