not all cryptocurrency is a scam, many still have a selling value altcoin is very appropriate for the investment you may lose a lot of money so don't trust it too much so that it makes you suffer a lot of big losses cryptocurrency has many benefits the most interesting cryptocurrency is where many people invest cryptocurrency It's something interesting that a lot of people have already stepped in and invested in.
not all, but most 
it depends from which point of view we see it. there are projects that are actually created to address real-life problems, some are created just for the sake of making a quick profit, then development stalls and disappears, and some are created to deceive investors with falsehoods.
we must know the risks, do not fomo, do not be greedy. get involved if you really believe the project has strong support. but this is very difficult, because there are many fake projects popping up every day. the key is to use free funds that if it is lost you can still prosper.