How will a crypto coin stop existing?

[Kelvinovie2]

The other day we talked about crypto after death, you can find it here: https://bitcointalk.org/index.php?topic=5044423.0, response I got brought about another question i keep asking myself, how can a crypto coin like BTC, eth and the likes stop existing, don't judge my thinking just try and think this through, what would really happen when coins like BTC are fully mined and we start getting mining rewards from fees, now let's just say for example eth total/ circulating supply drastically reduced as a result of loss of wallet access probably maybe users death, pk loss and so on, and this could have effect in supply over the years to come, it means supply will always reduce weather we like it or not, so does this mean we going to get to the point where there will be no access to coin like BTC or eth access, or the developers have a way of tackling these problems like creating more coins? your ideas and contribution are welcome.

[Denreal]

The total supply of a coin cannot be affected by the demise of a holder and neither can it be affected by a lost wallet. The only effect these can have is on the circulating supply.
The existence of a cryptocurrency is dependent mostly on the team, except the coin which has been abandoned becomes a shit coin whose price has reduced drastically.

[passwordnow]

You misunderstood it if ever a coin will reduce its supply, it won't affect our PK's, wallets and even our current coins.

It doesn't mean reduction of supply means no access to that coin anymore. That's not it the way you are thinking, why they are reducing the supply? that creates more demand to make the price higher. Apply the law of supply and demand and that's the reason why many tokens are being burned.

[Iluka]

These trash talks are existing from the very beginning...and crypto is still exist..  The same story was with internet 20 years ago...