Consider altcoins as gambling, invest the amount you can afford to lose. If there will be price drop, it will be most significant on altcoins, but the bull time will be massive for some altcoins and probably Shiba Inu would be among the altcoins that will have price increase during the next bull run.
But for investment advice, I will advice you to invest in bitcoin.
I used to invest in altcoins because of the fact that they give a chance to earn some money without a huge investment of it. What's your point of view whether bitcoin can give the opportunity to earn because nowadays I see more people who lose money from it instead of earning
That's because they cannot handle the shock of the sudden dumps. Those people who you lose more are always expecting to win the game. It's all about patience, throw away that quick money mentality because it will not get you anywhere.
About Shiba Inu, what you are planning may be the correct way to make some money out of it. If you are decided that it will be the coin of your choice.
Trade it, because that's what I did before and I made some profits.
It's not for holding long-term, in my opinion. It's better off to be always moving.