Bitcoin price growth has indeed been proven in recent years until now it still has a positive ROI,
but for investments starting this year, ofcourse we hope that Bitcoin can reach a new year again, but that cannot be guaranteed either,
if you add There are too many bitcoins in your portfolio that you really need to know when to get out.
Historical patterns of Bitcoin price have demonstrated that it is not a good item for short term or day to day trading for generating profit unless you are professional trader and fully understand market dynamics and posses sufficient knowledge/experience of technical indicators. however, holding Bitcoin for extended period of time can potentially generate significant profits, particularly after its halving event that reduces block rewards and consequently increases its scarcity.