I would advise caution when considering investing in or participating in any gambling or "defi" system, especially one that is advertised in such a manner. It is important to research any investment opportunity and understand the risks involved before committing any funds. It is important to note that gambling is illegal in some countries, and even in places where it is legal, it can be highly addictive and can lead to financial problems.
Additionally, the description you provided for this "Endblock" system raises several red flags. For example, the claim that it is the "pioneering collective reverse betting system that marks the inception of gambling" is highly suspect, and the lack of information about the team or company behind the project is also concerning.

The idea of a "smart contract" and "blockchain system" ensuring "100% transparency and automation" is also a common rhetoric used by scam projects it's not enough to prove the legitimacy of a project.

It's also worth noting that the use of a referral system and the notion that you need to be referred to participate in the stake is a classic Ponzi scheme indicator.

I strongly advise that you do not invest in this or any other investment opportunity without thoroughly researching it first, and consulting with a financial professional if you have any doubts or questions.