I guess it's really up to what altcoins you are going to invest to for long term. There are a lot of good altcoins, but on the other hand, it's market is dominated by a lot of whales and manipulators and pump and dump groups. So just be careful what altcoin you are going to invest in this bear market just saying.
But as for the majority of us, bitcoin is will be the best investment. Yes, the growth percentage will not be the same as some altcoin pumps, but least it is a safe investment and the risk is not that high compare to altcoin market.
That’s true, I literally went with mainly altcoins if we look at my portfolio. I mean think about it this way, I have bitcoin as my biggest "one" piece, I do not have anything more than bitcoin, but when you combine everything else, bitcoin is less than 50% of my general portfolio, meaning 50%+ of it would be altcoins.
This is of course showing that we can still trust bitcoin more than anything else, but things like ethereum or bnb do not feel like they are bad in the long run neither, they are quite good. This is why the best type of investment is the one that you could do while waiting for it to get better and not invest into shitcoins because they have a bigger chance.