Bitcoin prices are going up and down these days. People are hopeful that the price of Bitcoin may well go up by 2021. Bitcoin has been legalized in a number of countries, due to which Bitcoin prices are now recovering. If the price of Bitcoin goes up to 25,000 by 2020, it will be very difficult to buy.
I am sure bitcoin can go up to $25k, but I won't say that it will happen this year or in the next year because we don't have the right info about that. You don't have to buy the whole of bitcoin if you don't have much money equal to 1 bitcoin, but you can buy for some fraction of bitcoin so you can use it for trading or just holding until the price can increase higher. By doing trading, you can have a chance to increase your bitcoin amount, so, in the end, you will make 1 bitcoin or more in the future.