In an ideal world this should incentivise more people with single family homes and capital to invest in Solar + batteries and even with tariffs I am sure the breakeven time will still be less than 10 years (also after accounting for the fact that utilities will not be paying a lot for your electricity though time of use pricing and batteries may help a bit)
Man that's some environmentalist centralist government planner thinking: mess up your energy policy so badly that prices rise like crazy and it starts making sense for people to switch to way more expensive ways to convert energy.
Is this supposed to be positive?
That's just the flip side for individual investor. There is also collective risk.
The worst comes when there are too many investors with margin debt and they start to get margin calls at the same time. This causes prices to drop and it triggers even more margin calls, starting an avalanche where stock prices drop just from forced sells.
See Archegos Capital, Evergrande in China, 2008 financial crisis, Citadel (the hedge fund) with assets almost equal to "securities sold not yet purchased", etc.
Then there's just tons of crime like JP Morgan making 10 billy by spoofing gold prices and then paying a 1 billion fee to pay off the complicit regulator and be able to "keep playing".
It'll pop, the question of course is when? Ponzi's can go on for decades before something breaks.