Not only can the price of Bitcoin go down in the future, but the price of Bitcoin can go up a lot in the future. But no one has control over the market so you can't say with certainty that the price of Bitcoin will decrease in the future.
There's this thing i know, that after the next year bitcoin halving, we are not going to have anything below $68,000 after which the new all time high has been achieved, which also includes that bitcoin is ever increasing in value and always demanding being a currency, the reason why it's volatile is to have both the rise and fall while it continues to increase in value over time, while it price keep pumping and dumping.
Mr Dunamisx, if I may ask how sure are you that the price of bitcoin will get to that amount next year after the halving? Some times people give predictions and forget that there are other factors that could lead to the depreciation of value of Bitcoin. Since I am not sure of what the price would be in the future, I prefer to carry on my normal activities and keep the expectations that any might happen, so I'll not be handicapped should in case the market goes bearish or sideways during that period. Though we know for sure that the value will continue appreciate in price due to history and some factors, but we should not forget that there are factors that could make the market bearish, most especially now that the news of cex being hacked is flying every where.
Maybe you should take some steps backwards to learn about how the market value all started to where we are now, maybe you could realized that the value have tremendously experience an incredible increase over time despite the rise and fall, now coming to the halving, after every successful halving event comes in the bullrun while there's also high market volatility, during this period, it doesn't mean that there won't be bear, but the bull will overcome the bear market in most cases as they will be all very volatile for change at anytime.