Most European residential electric systems operate at 240v, versus 120v in the US, which means you can only backfeed a US outlet with half the power you could in a European outlet. That alone makes this system half as useful for US applications.
Remember the tmobile un-contract? This is literally from their press release in 2017: “T-Mobile ONE customers keep their price until THEY decide to change it. T-Mobile will never change the price you pay for your T-Mobile ONE plan. When you sign up for T-Mobile ONE, only YOU have the power to change the price you pay.” https://www.t-mobile.com/news/press/un-carrier-next
Remember how they promised the FTC they wouldn’t raise prices if they could pretty please merge with sprint to become the biggest telecom network in the country? https://www.yahoo.com/news/t-mobile-promises-sprint-merger-195428217.html
As others have mentioned, you can invest in the stock market within your 401k, though your options can sometimes be limited or saddled with high fees depending on what broker the 401k is through.
If yours is through a shitty broker then you might be better served by opening an individual retirement account (IRA), likely a Roth IRA given the limited info you’ve shared. You can open one with a broker of your choice, so go with one of the better ones like vanguard or fidelity. Using tax advantaged retirement accounts will always beat saving your retirement money in a non-tax advantaged one, all else being equal.
Edit to echo the flowchart from one of the other comments: https://imgur.com/u0ocDRI
This is the core of sound personal finance strategy in purified form. Great resource!
Counterpoint: “40 percent of the officers stated that in the last six months prior to the survey they had gotten out of control and behaved violently against their spouse and children.”
And that’s just the ones who freely admit to being abusers. It doesn’t take a huge mental leap to realize that a position of authority with a low barrier of entry is a magnet to people who want to abuse that power.
You can find the source for that survey, as well as the context here: https://sites.temple.edu/klugman/2020/07/20/do-40-of-police-families-experience-domestic-violence/