It will be even better to add to these two cryptocurrencies some altcoins that are the best-trusted ones. I am talking about Litecoin, Monero, DASH, Zcash, TRON, and Cardano. You need to hold at least 7-8 cryptos.
maybe if you have a lot of capital for investment you can do that. but if you only have a little capital, you might have to choose only a few assets. as discussed, ethereum or bitcoin. if I will buy ethereum for the long term, even though bitcoin is also good for the long term but in accordance with the capital that I have I think ethereum investment will be more profitable.