

Absolutely. They do tend to be quite a bit more expensive per watt though. From my research you can get cheap panels and just plug them into a LiPo4 battery or even lead acid batteries as well. It’s just that batteries (even though they’ve gotten a lot cheaper) are still expensive enough to nearly double the cost of the system in many cases so the plug-in option with 400 watts of panels etc gives you the best bang for the buck for sure. But it’s not legal or possible in many US states (though that is changing fast)



Very low fee cross-border (remittance) transfers using stablecoins (cryptoassets that are pegged to a fiat currency like the dollar) allow people to avoid getting ripped off by companies like Western Union.
On crypto platforms like Ethereum that support smart contracts (basically computer programs that run on the blockchain and allow you to automate transfers etc), you can provide liquidity to money markets and asset exchange platforms and earn many times the interest yield (APY) of what you might get at a bank for a similar thing (like 12-60% vs 2-5%). If you’re a real finance nerd you can also access various exotic financial instruments on other platforms that otherwise wouldn’t be available to you unless you were at a huge investment bank or hedge fund and even some that aren’t possible there. These are often called DeFi platforms (Decentralized Finance)
Another huge use of crypto networks are money laundering and scams though so beware. It’s still a largely unregulated black market. Never put more money into a crypto network than you can afford to lose.