For a long-term investment, Bitcoin and ETH will be suitable, and other coins should be chosen by everyone for themselves, because everyone sees the prospects of different coins in different ways.
I suggest not focusing on the long term for times like this. the market will experience many updates this year. many projects have announced updates this year. maybe some will succeed, but maybe some will fail. but thinking about long-term investment and leaving this big movement this year will seem unfortunate. stay focused and take advantage of every opportunity available. we can benefit repeatedly.
I think that way will be difficult maybe for some users including me, because if we divide some focus at least we also have to prepare or have more capital and I think it is something difficult, because even with us only focus on the long term or by investing only in top coins in fact it is enough to spend a lot of money. But if you have big capital, then that method is indeed the best way to gain more profit, but still do it with full calculations and plans that are mature and remain careful.