The most powerful card in the stock market

One important factor that investors may forget to take into consideration when buying stocks is the power of government. During these 2 years I have seen this card played in the stock market both causing the stock to crash and to rally.
When covid first begin, we all know that airline and marine industry are hit the hardest. Many worry that they will go bankrupt and that will cause investors to lose all their capital. however, Singapore gahmen (Singlish term for government) say cannot. $新加坡航空公司 (C6L.SG)$ and $海庭 (S51.SG)$ was rescued through $淡马锡持仓 (LIST2536.US)$. Gahmen is not gonna let them die and mop up all the unwanted rights issues to ensure they have tons of money to survive the storm. I was one of the silly goose that bought tons of their rights issues too Well, they survived and the share price did not keep going down to oblivion despite them losing tons of money.
On the other hand, we saw that Chinese gahmen had been whacking hard on Chinese company, trying to make sure they dont go out of line. The one that kena whack the most is $滴滴(已退市) (DIDI.US)$. You want to fly? gahmen say cannot. bam fell into the sea and struggling to survive. I'm also one of the silly goose that bought a bit, in hopes that they will uno reverse the gahmen say cannot card. and not forgetting all the poor Chinese stocks like $富途控股 (FUTU.US)$, $向上融科 (TIGR.US)$, $阿里巴巴 (BABA.US)$
So what can we learn here? gahmen is an important factor that can promote and kill any company or industries they want to. So do keep a lookout for any positive trend such as EV, AI and Green energy, and be a bit more careful of those that is treading on gray areas like crypto $比特币 (BTC.CC)$, which could be good regulation (like making it a recognised currency) or bad regulation (like China banning crypto). History have shown that everything that is not regulated will be regulated eventually. so trade safe