I'm not a huge Cuban fan but I can't argue that this doesn't feel like a bubble. For those us of us who lived through the 90's tech stock bubble, this seems very familiar. There are countless altcoins issuing tokens with nothing more than a concept behind them, eerily similar to all the internet companies going public in the 90's with only a website idea and no business plan to monetize it. History does repeat occasionally, so everyone should do their own research and not risk more than they can lose.