If it is all a scam, it's probably worth having the forum for people to learn that.
I am not convinced it's all a scam. Some of it is. Maybe much of it is. Some of the trading exchanges may be.
As this mainly an investment forum, consider the cryptocoin called numerai.
https://numer.ai/The company uses artificial intelligence to make predictions used to run a hedge fund. People in essence pay using Numeraire cryptocurrency to enter stock market prediction contests. The better the predictions you make for their network, the more you are paid back, in their cryptocurrency. Thus the cryptocurrency has a real, though niche, function.
It's a real hedge fund. If you have $5m you can invest. They've paid out $30m in their cryptocurrency, according to their website, which presumably is then sold for dollars. The cryptocoins trade at about £13 today. Is this good value? I've no idea. Is it a scam? I don't *think* so. Have I bought any? No . Couldn't they just have used a real currency instead? Maybe, but so what?
There are several other examples of cryptocurrencies that have an actual purpose. Whether this means it's sensible to go and buy them at today's prices is a different question.
I don't see that a cryptocoin is by necessity much more of a scam than a gold bar. Gold has uses in jewelry and industry, but its main value lies solely in the hope that the next investor will pay you more than you paid. Much like good old bitcoin. Though a gold bar will remain in existence for longer.
It's true that it's hazardous. It's also true that plenty of people think bitcoin will be over a million dollars by 2030.
I have no idea if they are right, but it's not necessarily crazy to have say 1% of your assets spread over a few different cryptocurrencies.
I hate the energy requirements of bitcoin. Other cryptocurrencies have been created without this energy overhead, but they have not taken over in popularity.