Avoid such coins. Stick with the top marketcap coins. Even buying and trading bitcoin can be profitable if you are patient and know when to buy. For example since March 2020 when the Bitcoin price hit ~$4,000, the price is now up by over 700%
Nothing beats out on getting knowledge due to experience and we do all came into that situation where we do believe into something which isnt really that truly happening into this market.
List would be long when it comes of crypto exchanges being shut down due to those very common reasons. Exit scams, regulation and other issues.
We should always put up into our minds that its better to stick into known platforms rather than risking on dealing or engaging on something which is new and hadnt been trusted yet
because you wouldnt know if one day that the platform you've been using would just simply vanished away.
Expect for the list to continue as we approach those future years.