Bitcoin actually is the best for investment here in this field of business. But I think it is only good for the individuals who have a big capital and motivated for the long term, but for the traders who is not in the middle class type of people, buying cryptocurrency is very suitable for them like me.
I agree, crypto market needs so many different segments to cater to different classes, rich people can come with perfect products like bitcoin and poor and middle people can come to altcoins, expiry date won't be long and risky but save quite a lot of money, even some rich people choose altcoins to limit the risky cost of repairing expensive products like bitcoin. Altcoins are also not a completely inferior product, they just lack a reputable establishment and are relatively diverse, users may not know the right choice but when determined well, they will definitely participate in the long term.
I disagree that bitcoin is for big capital people, its long term project and it will make you profit in the long run. I do agree that there is a good amount of money to be made on altcoins if you are brand new to it but then there is the fact that bitcoin will be more safe investment as well. So, just keep your money in bitcoin and wait a decade if you have to and you have a ton of money.
I am not saying altcoins do not make more money, when you look at the top returns its always altcoins and if you can find one that will give you that type of return you can make a lot more money, and people who are not wealthy look into those because they need to make a lot more money and 2x is not enough to be rich. However do not forget that people who are looking into those are also the people who may find some shitcoins as well, which is why altcoins are riskier, whereas bitcoin is at least guaranteed.