Investing big in ethereum ... great idea or not?
I think what you say can be true or not, because now it is back to yourself who has funds because you are the one who determines the end, even though you may ask for advice from colleagues here.
trying to analyze is good learning to hone so that we can know better, mistakes are the best learning to correct ourselves so as not to return to make these mistakes.
if I suggest that it is not good to invest in one token even though we believe the token will be profitable, we must always have the view that we could be wrong too. therefore it is better to share a number of tokens that you think are very reliable and able to make profits.
There are plenty of good enough altcoins you can just have a look at Coingecko to try to figure out what to invest in.
I hope you produce the best for yourself and don't be sorry to continue to try and hone your knowledge of crypto.