1) International transfers: crypto is the best here. No stupid regulations, fast and cheap unlike SWIFT or something like it.
I've used to work as international freelance programmer since 2003 or about and payments were the pain all time before 2015 or about when I have moved to crypto. Lost transfers, compliance investigations without any real reason with blocking funds for many months, failed transfers because of some stupid errors like missed letter in the receiver name, etc. And even in the best case you should wait for day or two without any info about the transfer progress. Instant card payments are illusion only, it works only in some cases until it fails (for example, my country currency exchange rate is very volatile sometimes, and some people used to buy with card payments smth nominated in US dollars during this periods, hosting for example, and they thought they have saved their money with this buys, but they were really surprised when their accounts were decreased in several days after that, because real transfer takes several days, and it is executed with the exchange rate actual at that time). There is nothing comparable with crypto in international transfers.
2) Distributed storage. I can't believe you don't know about IPFS. When I've tried to download the book I've failed to buy last time I've found that pirate sites use IPFS links more often than torrents now.)
3) Smart contracts allows amazing things sometimes. Do you know about the flashloans for example? You can loan a millions without any credentials, use it for exchange arbitrage for example and if you fail to get your profit and can't return loan plus interest it suddenly becomes like you didn't loan it at all.) Looks like some kind of magic for me.)
4) NFT is misused tech. It really guarantees the ownership, but not for associated media.) Best cases for NFT are tickets or license keys. But this cases can't give you millions in a minute that's why nobody knows about them.