Well, I know everyone says that gpu mising is not profitable right now when you can get only like $1 profit a day per gpu. But due to this mining equipment now is pretty cheap, gpu's are not very expensive as well. Also cryptocurrencies should gain more attention in future with bitcoin price going high due to recent halving and worldwide inflation of fiats.

So I'm consider getting a 6x RX 5700 Evoke 8GB, each new one costs about $420 in my country. NiceHash calculator shows me that currently I'd get $3 per day after paying for electricity. It's not much of course when compared to cost of the righ which would be around $2800, but like I said before cryptocurrencies can expect another "rush" in the future. I also would hold all the btc I'd mine.

And therefore I have few questions: What do you think, is it better to build a rig and "mine for the future" or just invest money in bitcoin or other crypto? Also, If I decided to build a rig with RX 5700's now how much time they would be viable? Are they still would be considered at least medium gpu's in 2-3 years?

Thanks for every opinion!