Why are you limiting yourself on Europe?
There are countless offshore Banks where you can deposit up to 200k without having to care about taxes and such.
The thing is, if you want to use your profits to invest in something else then yeah you really have to get them taxed
so you can justify their existence. If you're looking that way, a "fundraising via bitcoin" would be a nice option if you
know what I mean, from there and on I don't think you're going to get taxed for your active capital.