That depends. Part of the attraction of blockchain is that it keeps a record of each time a transaction happens, making it more difficult to steal and flip than, state, a painting hanging in a museum. That said, cryptocurrencies have been taken prior to, so it actually would depend upon how the NFT is being saved and how much work a prospective victim would want to put in to get their things back.
Most likely. Bit rot is a real thing: image quality deteriorates, file formats can't be opened anymore, websites decrease, people forget the password to their wallets. But This Piece Covers It Well in museums is likewise shockingly fragile. Yes. Most likely. A great deal of the marketplaces accept Ethereum. However technically, anyone can sell an NFT, and they could ask for whatever currency they want.
Since NFTs use the exact same blockchain innovation as some energy-hungry cryptocurrencies, they likewise end up utilizing a lot of electrical power. There are people working on reducing this issue, however up until now, the majority of NFTs are still connected to cryptocurrencies that generate a great deal of greenhouse gas emissions. There have been a few cases where artists have decided to not sell NFTs or to cancel future drops after finding out about the impacts they could have on climate change.
Well, like cryptocurrencies, NFTs are kept in digital wallets (though it deserves keeping in mind that the wallet does specifically have to be NFT-compatible). You could always put the wallet on a computer in an underground bunker, however. Believe it or not, you have choices! Steve Aoki is working on a show based on a character from a previous NFT drop, called Dominion X.
There's likewise a program called Stoner Cats (yes, it has to do with cats that get high, and yes it stars Mila Kunis, Chris Rock, and Jane Fonda), which uses NFTs as a sort of ticket system. Presently, there's just one episode readily available, however a Stoner Feline NFT (which, obviously, is called a TOKEn) is needed to watch it.