Just think about it a little.

You know that whatever happens with your government controlled investment, you will have a safety net from that government. History has shown us how governments have bailed out Banks and/or injected millions or even Billions of tax payers money into economies to protect it.
They are printing Trillions of Dollars to reduce the impact of this Covid-19 virus on their local economy and they are doing this with money that was supposed to go to critical needs. (Public Health care / Social grants for unemployed people etc.)
Regarding the question in the name of the thread, I think it's a psychological phenomenon. Even though the government is not always doing it right and can act in the interest of the few while sacrificing the interest of the many, it is still more comfortable for many people to get away from taking personal responsibility and be under strong governmental protection. People need reassurance, a father-figure which the government gladly provides in countries like the US. So yeah, investing in something controlled by the government seems safer and more reliable, whereas it's not a secret that investing in Bitcoin is risky and you can only blame yourself if you make a mistake.