I don't think that Bitcoin is suitable for short term investment. IMO, BTC is more suitable for medium term and long-term investment. Don't expect Bitcoin to give you 1,000% ROI in 6 months. That is not going to happen.
Nothing especial about that as you can't expect any investment to 10x your capital in 6 months unless you're doing drug trafficking, or any other shady activity. You can do short term investment on bitcoin if the timing is right. For example, those people that bought bitcoins when the price went from 1,100$+ to 760$+. Those who bought coins at the dip should make 200$+ per coin if they sell today.
If you know how to trade, any coin can be a short term investment.
That is why the buy low and sell high is not working well if you don't use any strategy on trading.. In my case and methods i experience to sell right now when the price as example that the price is hit at $1000 value exact amount.. and then i bought the bitcoin when the price is $900 so i sell 100% of my total amount of bitcoin and made a profit of $100 but the problem is the price is continue to increase.
So there is no exact time when the price will increase with the target price how about if the price continue to increase that is why ii made my own methods..
only 28% i can sell every time the margin hits like my margin is $50 i sell bitcoin in 28% in total. and save the profit.. if the price continue i sell 30% till you hit the highest price increase and wait again for the price down and buy again set your margin and make profit. .