Scalping is a good idea, but future is too risky.
I'm not against future, but not everyone is capable to do future trade. Only those people who are familiar with future trade can deal with that high risk. For people who never know it, better to consider another type of trading.
For scalping, it is quite safe to do, especially during this bearish market. As long as don't set a too high profit, scalping seems effective to use. Make sure to set entry and exit at a realistic rate/price.
Even though scalping is very effective to get short-term profits but must consider the risks that may occur unexpectedly, for example we have confirmed the signal of one coin in the rising phase but after the correction we buy it and then there is a significant BTC price correction that affects the price of other altcoins, so scalping must also consider the BTC price market factor.