If I base my answer on the title made by OP, I will not allocate the majority of my capital to Bitcoin because my desired return on investment on my capital is more than 10x. As far as I can see, that won't happen with Bitcoin.
Because this bull run is only up to x5 times 6x, it can only reach bitcoin. But if I allocate the majority of my capital to my top altcoins, it is more than 10x possible if I experience a return on my capital, for sure. I am just telling the facts.
It is true that to get bigger profits, altcoins are an option, but this is indeed riskier, but by choosing the top altcoins, we can also reduce the risk, I think if you have large amounts of money, investing in bitcoin is quite profitable, However, if we want bigger profits then altcoin diversification would be better. it all comes back to personal decisions, after we know the characteristics of each, especially if we are good at analyzing, then choosing a particular altcoin can provide a 100x profit
Just as you said bigger profits come with a greater risks . I know making good profits is nice and exciting. But still that doesn't mean one should risk his money , because investing in Bitcoin has already ensure you that you're in the safe side, though alt literally bring more profit and that . But still Is better to make small profits than to lose your money In some worthless project, that may pump at first and then dump without any plan of bouncing back.
When comes to investing you have to reason the kind of risk you can flow with , but if you have strong risk tolerance and you still feel like investing in some alt , all I can say is invest wisely and don't compare the alt coin to Bitcoin.