Short term for me is much better and more profitable but with a great risk compare to the long term investment. Long term investment is also profitable but all that we can do is to wait until btc price will finally rise.
Especially in the bearish trend and short term investment will be much better because if the price will be recovering again soon and then we can try to take our profit and walking out asap to secure our amount. Long-term is very risky right now. And i think that short term can catch the momentum on the bearish trend.