for investment I recommend going to Altcoins, but for trading of course Bitcoin can be an option, the reason is very easy, that altcoins can make you achieve 100x profit on investment,
it's just that you have to really choose alrcoin investments which are good in terms of fundamentals , yes there are lots of potential altcoins, for example Nervos and Verasity,
try investing in these altcoins and wait for the bull market to come.
It should be the opposite. For investing, choose bitcoin and if you want to trade then go with altcoins. But if you think that's easy on you and you're more confident with the opposite then that's better for you.
We have different styles in trading and some may not work for me but will work for you, that's why if you ever find a way to trade and you're effectively earning with it, keep doing the trade and the strategy.