I do keep records of a sort, as simple as they are. I do 95% of my playing on one crypto account, so records wise I print out the monthly statement thingy in cashier at the middle and end of each month
(this is for the very boring reason that as every session is counted as a transaction that if you play a few session everyday then by the end of the month it may omit sessions from the biginning of the month)
Apart from this I keep all the e-mails of withdrawal confirmations and the bank statements of thhe bank account it pays into (actually thats my only bank account, besides one with £3 in that hasn't been touched in 4 years)
Besides this I have about £150 in Party and £60 in Pacific which is certainly not my capital: pacific is there for when I'm elsewhere, Party is for $25 PLO.
Beside these measures I'm not very bothered, at the moment my income is coming from poker which I can't be taxed on. As my bankroll is on crypto depositing isn't something I need to keep track of.
This article might be of interest to you, few years old but I don't think much will have changed
Hope this is of help,
Molina