I can tell you that this strategy is extremely dangerous and I would not advise you to use it under any circumstances
No its not dangers at all infect it is good to buy at dip because it means to buy when the price is low and to sell when the price is high. I use this to make money when the price seems high I often sell my coin but after selling I wait for it to fall again and when it falls to extreme I again buy to hold so this is part of market business according to me.