We can invest to both Bitcoin and Stock market. Stock market is secured and regulated by the Government for the protection of investors. Also, you will have a hard copy as a proof that you have invested capital stocks to them. However, the downsides are, the costs are too high, so many forms to fill out and it takes time to process which is hassle on investors side.
On the other hand, Bitcoin is a new virtual currency that you can invest thru online by only using your cellphone and internet. Hassle free and only had small fees that you can invest your money to Bitcoin or other crypto at any time and place. However, the disadvantages are, not secured and might be hacked. The Government must implemanted rules and regulations for the security of investors so that they well be at ease of not losing their money. Moreover, we can earn additional income thru trading aside from our bi-monthly salary at work.
In my opinion, there's nothing wrong of doing both investments for as long as your plan is to make your money grow for your future and family than to buy unnecessary things.