for btcs to prove that they are good investments, they can be searched or researched over coinmarketcap.com about the past records of btcs
Do not complain and keep waiting for good luck. As you said we need a year or more to get a good profit from bitcoin investment because usually the price is in downward trend at the beginning of the year and prices skyrocket on the other end so it means we need at least a year. But many people are invested in bitcoin at the wrong time when the price is already high. And chances are people will buy bitcoin for a year more than 80%, and in this January many people expect bitcoin prices to exceed 50K or even 100K. I am careful about that, but when the investment is risky, I hope the price can stabilize above 10K this year.
I do not agree to that statement. One year is a long time. Only six months are enough to become an expert in any company anywhere around the world. Either you do online bounty campaigns, or long term or short term trading, you can really learn the tricks and tactics in a short time to be a good investor and not in a year. Having said that, if you invest in Bitcoin right now, you will be able to invest and earn huge in few months.