To be realistic? Bitcoin will definitely not do 5x in the near future. It will be long for us to see that because 5x means just about $350,000. If you’re looking to invest and get 5x, you should look at Altcoins. They are usually Altcoins that give even more than that, you just have to know which one. Most times it’s best to invest in multiple so you have profits from every possible angle.
Actually I think you're right that bitcoin will not do 5x in the near future, Because with the current price of bitcoin the possibility of bitcoin to do 5x in the near future is still in doubt, except for long term holding. However I think most of this altcoins can do 5x in the near future but the problem is how to know this coins, though is very good to make research but sometimes it doesn't work to our expectations, sometimes we can get a different thing from our research. However Investing in multiple is also a good idea but you need to make sure you're holding the right coin.