Most the favourite projects I have in mind to buy have already lose 80% to 90% of their value, if you are in my shoe would you start buying? I did try to buy piece by piece like 20$ to 30$ range but I still don't know if I am doing the right thing... I have these projects in mind
But looking for good entry per dollar
Understand this OP, we are in the season where every crypto in the market is not saved from a downtrend and that includes the stablecoins either. However, the 80-90% downtrend of the altcoin you want to invest in shouldn't draw you back from your plan because this season is the perfect entry time but you just need to do adequate research about the altcoin you wanted to invest in because some altcoin will never survive this correction market.
If the altcoin introduces some new concept that somehow solves the crypto-related issue, has good historical data, Marketcap, and is well supported by the crypto community it is good to invest in it.
Risk investing on altcoin have 80-90% downtrend because not all altcoin when drop drastically can reach higher price again, maybe you got experience with Luna coin after 80-90% downtrend have delist on end journey before moving to new version. How ever top coinmarketcap position standing I don't believe with 80-90% downtrend will have new moment can back to higher price again, I afraid when investing with 80-90% downtrend coin because I think wait several days later before become scam coin.