Well at this time obviously there are many who are entering a currency called "shiba" and there is a lot of FOMO there, as long as there is a bullish trend of BTC this may occur and stay up, but at the moment that BTC makes a correction, These coins will fall a lot, for me meme coins are special for those who hunt the pump and dump, and I agree as you affirm, that according to PlanB this year it will reach $ 100k.
This is normal to cryptocurrencies, they all follow bitcoin price, just like you said, it will be a more big blow on altcoins if the price of bitcoin is falling, even to the extent that altcoins will fall more than bitcoin. Only that what happened to Shiba Inu recently surprised me, when bitcoin was at $67000 when it reached ATH recently, Shiba was around $0.000004, but when bitcoin price was dropping, many other coins followed as usual but Shiba continue to increase and reached $0.0000089. But the coin has decreased now and it is presently below $0.000006, while not mean it will not follow bitcoin price again.
Some altcoins such as the Shiba Inu movement are sometimes different from other altcoins that follow the movement of Bitcoin. Shiba Inu's
movements are indeed difficult to predict due to FOMO, so it's not surprising that 10 days ago Shiba Inu reached new ATH, even though the price of
Bitcoin at that time was experiencing a correction. Something like this happened to Dogecoin 6 months ago when the price of Dogecoin rose to reach
new ATH, even though the price of Bitcoin is experiencing a decline. We must be vigilant when deciding to invest in meme coins or shitcoins, because
coins that do not have strong fundamentals are often used for pump and dump. So indeed, investing in Shiba Inu we must often monitor the market,
if the price of Shiba Inu suddenly rises, that is our chance to take profit. Holding Shiba Inu for too long is very risky for us to lose our money,
so investing in Shiba Inu is only for the short term.