If you guys believe in BTC, then mine whatever alt you are mining and sell for BTC and hold that BTC for months...years

If you guys believe in ETH, then mine ETH, and cold storage it and hold it for months...years

If there are some promising alts/token that can change the world, then sell some of your mined BTC or ETH and buy those tokens and hold for months...years

There were many cycles like this in the past. The true believer kepts mining at a loss or break-even just to accululate some coins and in the end it always paid off.