Ok got it thanks but many people are investing in shitcoin/memecoin is that the correct descision ?
I wouldn't say it isn't a correct decision if they get a huge profit from it. Probably these people are into short-term investments where they can get higher profit from these kinds of altcoin. This kind of investment is very risky but if you timed it right, You can get 1000x+ profit in a very short timer or you end up bag holding worthless token if you messed up on the timing.
The reason why they are making those short term investments is to basically "let's scam the scammer" mindset and nothing more.
I have a lot of friends who get into those type of little memecoin stuff on release day, even pre-sale periods happens earlier, so that means they get in as quickly as possible and as soon as it is released and goes up they sell and get out, which usually makes them a decent return, after they take out their investment and some profit, they leave the rest in there, sometimes it goes to zero, sometimes it stays, sometimes it goes up. But, they never trust their investment, they never think it is a good investment, they just want to make a profit and leave.