Well maybe its an advantage when you are able to show that you declared and paid tax reasonably 10-20% to avoid hassles
Of course it better be in a country which is not gonna spend years to audit and analyze every single digital skateboard you earnt for your ghost blockchain pet, but will tax the money earnt remitted to fiat to bank account.
But if you cashout and pay honestly on the whole amount the money you really earnt, build a trust relation with some banks on your real activity, I think it could in some case be a good solution for peace of mind︀ and make it easier to reinvest, we don't know what will be in the future.︁
I would say it depends every case, and what one is trying to achieve, there︂ is not one fits all solution, if you are already rich (officialy) or not, individual︃ situation matters
Some people here were complaining they were adviced in Georgia not to declare︄ their crypto profit by an accountant, and how it defeated their intention, that they actually︅ wanted to declare these to make it easier for the future