My tips at current time.
1. If you are in larger loss, hold, the coin would rise one day.
2. If you are in small loss or profit, hold or sell, wait the market to stabilize a bit and buy.
3. If you haven't invested yet, don't jump in now, let the market stabilize before buying.
In my opinion tip # 1 and 2 are pretty good, I guess we will not sell the coins that are currently declining because before investing in the currency of course we have done the research will prospects of coins that our investment goals and may only need a little time and patience waiting for coin prices to rise.
As for tip # 3 I don't agree because if we make investments (especially short-term investments) with a setabil price certainly little chance to get high profits from this investment venture. Indeed, this alternative is safe enough to minimize losses but if we are a trader of course this business isn't speculation that can give high profits.