We should think more about the risk of having all your investments in one single portfolio, such as bitcoin. Bitcoin happens to be the most reliable cryptocurrency for investment but at the same time, Bitcoin is a highly volatile asset. So I will still advise you to diversify your portfolio into multiple sources.
you are right having all your investment in one channel is what crippled some people for investment. Only people that have the mind of diversifying investment is people who have the experience before. Some people who don't know exactly how the investment of cryptocurrency works is the people who think of it and know everything about how to invest into cryptocurrency, like me i don't think that people diversified investment, even in the manual investment