Pierre, I completely agree people should work and provide value in exchange for the money they earn. Like any other financial asset class, there will be scammers and nefatious players. Unfortunately, without regulations, it will be hard to contain this.
That said, people investing in crypto (should) understand that outside of Bitcoin and Ethereum, you are assuming an extremely high level of risk.
The nice thing about Bitcoin is it allows me to earn money and store the value of said earnings in an asset that can't be printed by a group of central bankers.
Savers are forced to invest and assume risk to keep up with fiat inflation and monetary debasement. When more people understand the value of Bitcoin, it will provide savers with an option that can't be diluted which is a big win for people who are working and providing value!