I still benefit from censorship resistant transactions if no new participants join.
I still benefit from psudonymous levels of privacy if no new participants join.
I still benefit from the strength and security of the network if no new participants join.
Because the network itself is a tangible resource. Real people running software on real devices. Ensuring that every single transaction in every last block conforms to the rules of the protocol. All of that infrastructure exists. And you need bitcoin (the currency/asset) to benefit from Bitcoin (the network). The value is real and it's only the willfully ignorant who are unable to see it.
So, how are people able to return their investments in the bitcoin system without new investors? That is what it means to benefit from the system, from bitcoin.
It's not surprising someone as morally bankrupt as yourself is attempting to move the goalposts, but that's
not what it means to "benefit from the system", unless you are merely a speculator. Granted, for some that is the primary motivation for getting involved with Bitcoin. And I feel sorry for those people. Nothing in the whitepaper says the purpose of Bitcoin is to buy it cheap for fiat and then sell it high for fiat. But you, like many in the shallow and uncomprehending media, are only capable of seeing that side of things. Which is why you parrot the weak and flawed arguments posed in crappy articles from worthless gutter rags with no journalistic integrity. You don't have an original thought in your empty little head.
The real benefits of Bitcoin are the tamper-proof sending of funds without interference from, or reliance upon, any middlemen, the transparent and open nature of the network allowing anyone to validate that a transaction has taken place and all the other things that have been repeatedly explained to you. All the things fiat cannot offer us. You are willfully blind to that side of the argument. You won't acknowledge it because you are fundamentally dishonest. A putrid little shitweasel with no decency.
Your not sending funds. You're sending certificates of investment. The problem is that these certificates are fake, worthless. Because, they don't give you access to value inside the system that issued it, like certificates of banks or companies give. That's why you have to find new suckers to scam them to buy these worthless certificates. Without them, game over.