Reminding that ETH was already 5 years makes me feel regretful again for not buying it when it's price was below 50$ even though I have huge stock of BTC that time.

Regretfully so too, not investing in etheruem early enough isn't really a good story. But is a lesson for many like me too to invest in some coins with value now and maybe in same 5years we can have a beautiful story.