Before making a purchase decision you should check the coin chart. In this case you can see that here is the classic pump scheme and after the dump in action. If you just want to speculate and earn then this coin at the moment is likely to reduce your position by a distance rather than increase it.
Meme coins are only suitable to be chosen in the short term duration, because they are not intended for the long term, because considering things like you said, namely Dump after the completion of the pump, so the risk of holding it in the long term is very large.
A wise counsel to those who care to invest in Shiba invest or buy low and sell high basically that is the better way of earning from meme coins, long term investment in it cannot be guarantee but short term, although taking the risk of investing in Shiba with $40 is a good idea I agreed with the OP however I won't subscribe to idea of massive or huge investment in it for a long term perspective being a pump and dump meme coin.