Go for Ethereum. It's very bullish right now. Last 24 hours volume increased 22.17% and 30 days Ethereum price increased 16.49% in USD. I hope Etherum will be hit a new all-time high this year. yesterday Ethereum just activated a major change called the ''London hard fork''. For this hard fork news Ethereum price pumps a lot. The current price per ethereum is $2773, Hope soon we are getting an all-time high price. Besides Ethereum don't forget to buy some top-level altcoins like Cardano, Algo, Matic, Vechain, etc
current fundamental and market sentiment very positive after London hard fork , need more trigger to make ethereum price could break $3k . From list above you should add another coin , maybe you forget about SOLANA , its great platform too and alot investors start give huge allocation for it.
The price of most altcoins are all depends on BTC so If we are bullish in any specific altcoin like for example X-coin has too many good updates and then btc crash hard most coins including this xcoins will become bearish so I think we have to remain bullish in both btc and altcoins despite this price fluctuates almost every day.
not always will move paralelly with bitcoin , only altcoin that have weak developtment and demand will crash when bitcoin drop. But for altcoin with strong developtment it will move againts bitcoin , even that drop it will not much.