First time seeing your videos, well done, good content.
To me, anything that holds value can be considered money. FIAT currency is becoming more and more like cryptocurrency in a way...less people carry the physical cash around in their wallets. It can get lost, stolen, burnt in a fire...so people keep it in their bank accounts.
That money doesn't sit there in a vault...the bank lends it out, invests it...and it is all tracked on a giant ledger. Same concept for Bitcoin and blockchain.
Baseball cards are currency, coupons are currency, season tickets are currency...the list goes one.
Thanks for the vlog, cheers.