so at least in "theory" nobody would want to buy and hodl them

Just to put it into perspective, we've moved at least 644,450,287 v3 Bitcoin Testnet coins.

https://mempool.space/testnet/address/tb1qm6juaswhsmdl4w4ezj7lqx5c6xdz7ct99weumg

That's a lot of grocery carts returned.  I think that address speaks for itself.

...

We've moved at least 6,128,650 v4 coins:  https://mempool.space/testnet4/address/tb1qf6yq8r42p3dpmpn7nxexhm628uduj7spm0skmc