All currencies are Ponzi schemes. Bitcoin is a currency, not money. And yes, all currencies start at a value of zero and then return there. The only question is how long of timespan between point A and point B. For it to qualify as money instead of currency, it would have to be a non-perishable, physical commodity, among the other traits required of money.
Where else do you make believe the "durability" requirement of money is supposed to emerge from? Digital shitcoins have zero durability because they can die at literally any second, while it requires a blackhole hitting the earth to kill off metals. This is why those gold and silver coins from 2500 years ago still have value today. Will bitcoin exist in 2000 years? Fuck no. You would be lucky if it hasn't died or been replaced in 10 or 20.
Now some idiot will claim, "who cares, maybe bitcoin will last 100 years. That's all I need because I don't plan to live longer". It doesn't matter what *your* plans are. The fact you admit it can die at any second and cease to exist is why it's a currency and not money. Claiming bitcoin is money when it's not even fungible and clearly still not money even if it was is probably the biggest hoax ever shoveled on humanity.
Leaving aside the fact that literally everything starts at a value of 0, including the universe at the big bang, you are mistaking bitcoin for a currency when it's not. It has certain traits that can make it a currency, but it is money, and it's a better gold.
When you get stopped at airports trying to cross any border, or when cops bring a radar and scan your home for metals in the up and coming Orwellian nightmare, you will by then understand why you should have been holding Bitcoin instead of tangible metals. You are still stuck in the middle ages where something being tangible is a positive.
The Bitcoin network itself is tangible tho, every device containing a full copy of the blockchain specifically. Hard to destroy all of it.
The only trait gold has that's superior to Bitcoin is it's network effect, and that is a function of time. The longer Bitcoin survives, the less of an argument that is. Also the longer Bitcoin survives, the lower chances of an altcoin overtaking Bitcoin, because of the importance of network effects as we can see with gold. Even if a theoretical superior technology arises, it would still be a dumb risk dumping all of your coins for an altcoin with 0 test of time when Bitcoin would still be doing fine.
If deciding improvements by altcoins come, it could always be implemented in Bitcoin anyway.
Im not saying "dump all of your gold and buy Bitcoin", im saying that anyone being a 100% goldbug ignoring Bitcoin is making an huge mistake.