The best way to keep it from crashing is to used it but it cant be done by alone unless you are a whale so you need to asked a lot of people to used bitcoin the more person you asked to used bitcoin, the less percentage it will crashed
Even if many people use it, and the price continues to rise, the temptation of profit are still there, people will be selling off their bitcoin and it will be starting to crash again. Bitcoin is volatile so we do not need to worry about this things. It is normal for this digital currency to rise and to fall.