But today I see bitcoin down again, why this can happen? is it a bubble? how to make the hype to be stable and go back up?
Stuck in reverse? Maybe its time to look at the graph clearly, if you are using exchanges better to check if there is intermediate and or advance trading indicators you can use, most crypto or forex offering crypto platform I know have this options, and be sure to study the Psychology of Trading.
Read news concerning bitcoin and altcoins to be able to track why Bitcoin price greatly down this recent weeks, check also some upcoming special holidays like Chinese new year etc.