If you are as an investor your goal is to make a profit and keep safe all of your funds if you want to earn more money you need to keep it safe. Investment is full of risk it depends on all of your decisions how does it work...
There are a lot of factors why people don't want to make an investment in bitcoin.
For example :
The news they got related to the bitcoin scam.
Afraid to release a large amount of money.
Does not have time to risk because it requires a lot of knowledge and skills.
Everyone has thier own opinions and likes, maybe there are some things why they cant invest to bitcoin,
1.bitcoin is a fraud
2. Local tv and banks dont like bitcoin
3. Bitcoin is use to scam people. But not literally bitcoin is a scam.
These are other factors why people don't want to make an investment too.
Also if the government will support this kind of coin there is a chance that many people and investors will trust this kind of coin.
Maybe Because Bitcoin is new or still young for investment . Beside that , common people is not enough understand about bitcoin.
So , They choose to invest in the stock market. Whereas Bitcoin can give high ROI.
I think the bitcoin is not young anymore it's already started on the year of 2010 we already law a lot of market movement which is a thing we could be used to make the right investment and when we must need to put a large amount.