Success story: I bought some ERC20 on EtherDelta for 0.000000018 a token (about 1 ETH worth of tokens), waited for three hours and it was up by 30%, sold happily and went to sleep.
Failure story: same token, woke up next day to find it x21 its initial price.
Another success/failure story: bought Tron (TRX) at 88 satoshi, sold at 102 satoshi same day just one week before the token exploded in price.
This made me stop day trading and focus on medium–long terms as they are much more profitable and less stressful for me.
I have dome the swing trading over the TRX many times and it has benefited me a lot back then. Now is the case very different and may not be profitable with it. But I always believe the Swings must be closed with the few hours of time and try to grab upto 5% of the profits. If we get that much hike in short period of time then it could be miracle because not all of the crypto currency are having tendency to move in that fashion. Must find the coins first which has such ability to move fast upward and downward. So swings = few hours = upto 5% profits.