> Tax arbitrage, iirc. In some jurisdictions like the US, exiting your position into USD is a taxable event for capital gains taxes. I seem to recall stable coins were invented to avoid that. I can't imagine tax authorities allow that loophole though.

If they did, it looks like it's closed now. At least in the US, converting between two cryptocurrencies is a taxable event:

> There are plenty of questions about whether or not investors can claim a direct crypto conversion (e.g. bitcoin to ethereum) as "like-kind", avoiding taxes on those transactions. The tax laws changed beginning in 2018, and like-kind exchanges are only applicable to real estate transactions.

https://www.coinbase.com/learn/tips-and-tutorials/crypto-and...