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
They panic because the price has dropped and then sell their assets so it's a clear loss, Bitcoin also give an opportunity better to earning. I think if you're more interested investing in shiba then do it, but it is better to split half into bitcoin or other altcoin that according to your observations will have potential in the future, so having more assets is best not only one.