This is the same for all the cryptocurrencies. It is possible to invest for a long time, but no one can guarantee that after next dump your tokens will cost anything. Today all markets are red, these tokens are same as the others. When you invest in offline casino - you see the equipment, the building, documents. When you invest in online casino - you just have to believe. It is not good for investing.
Tokens like Owl and BFG has a buy back mechanism to guarantee the value of the token regardless of the bear market because they are using the casino profit to give value to there tokens. This is the difference on project like this with working product that generate profit compared to typical shitcoin that is just pure development and no plans to protect the value of there token.
The buy back don`t guarantee anything. I invested in several projects with buy back. As a result - i`ve got profit only in 1 of them, in the others the price was down to the floor. So even here there is nothing new or unusual.
I don`t say that these projects are scam, i just say that if you decided to invest in such projects you have to use the same rules as with other tokens.