As of right now, the bitcoin price is expected to keep going up in the next 20 years. But can it last that long? I believe it's possible. But can't it crash at a random time? Like the price going down hard.
Since the price is unstable, it can crash anytime and go higher. Also, the sources of bitcoin is only limited. I think after 20 years, after all bitcoins are mined, the price of it will be high because some people may want to buy it in any amount.
Maybe you do not know that there is something we call the having every four years the amount of bitcoin created each time a block is solved is halved, some calculations have been made and put the year in which the last bitcoin are going to be mined in the 2140, so the scenario that you are projecting for the next 10 years is completely wrong and it is not going to happen.