If you want to have a short return of investment then not invest on bitcoin. Bitcoin is so volatile that even it increase and decrease in second. Most people complains about their loss on the price drop, I got loss too, but you will be broke when you sell it on a low price. If people would be patient to wait a bit more then all would be good. Who else make millions on just a week ? None. Im saying this not just to promote holding but also encourage all those crypto users be patient and be calm on the price drop. Youre still not loss until you sell it on low price. Hold it for a while, if you are weary and try investing on others like ICOs until you almost forget it and go back when it pumps again. Nobody know when would it be increased but it would. Be strong people.
You say bitcoin is so volatile so short-term and long-term it's the same, we still can not estimate the price in the future, even though it's in the long run as long as you sell at a low price so surely you will lose, I think the short or long term it depends on your strategy to see opportunities buy and sell, not from time period.