*First of all,* ***please upvote for visibility + more opinions*** *- this concerns* ***all of us****. Also, if you're stupid enough to think you'll get away with avoiding tax's despite KYC'ing to Coinbase & Binance don't bother commenting. News flash! you're gonna end up paying that tax in the long run + huge fines eating into your gains (or even putting you into debt).*
Anyways... I started investing in 2017. As a noob I did what most people did, chased multiple shitcoins, bought and sold various different pumps getting wrecked along the way. Then towards the end of the year, my portfolio increased significantly... but I DIDN'T sell - so I didn't "crystalise" any gainz. (I sold a couple hundred here and there during hard financial times, but I'm guessing nothing close to the free capital gains allowance).
Fast forward just over 2 years, since then I've been buying BTC/ETH/XMR on a consistent basis. It's getting to the point where if I were to sell enough of my stack, I'd owe tax as it'd be over the "allowed" CGT threshold.
That leads me to my question... how the fuck are you supposed to calculate capital gains tax when it comes to crypto? For the past 3 years I've traded in and out of alt-coins on multiple exchanges (some of which don't even exist anymore). It would be easy if it was just FIAT IN vs FIAT OUT, but the fact that CRYPTO to CRYPTO is considered taxable just makes it a nightmare! On top of that I did some freelance work (paid in BTC) which adds to the complexity.
Take another example of what confuses me: Say I bought 1BTC on Coinbase in 2017, then 1BTC on Kraken in 2018, then 0.5BTC on Coinbase again in 2019, and hold them all in the same wallet. Then if I were to sell 0.5BTC in 2020, what Bitcoin was actually sold? Half of the 1 BTC bought in 2017? Is it FIFO?
I genuinely don't know where to start and need help. I don't want to be in a shitty situation (for example some massive 2017-esque bull run happens just before the end of the tax ...