If you have a lot of bitcoins, example 10 bitcoins you can sell half of it just for taking the profit and use that profit as your fund. Wait for a small dip and you have to monitor it all the time.

Assuming that bitcoin went at $8,000 and you had sold 5 bitcoins, wait for it to become lower at $7,900 - $7,600 and do a short time trading.

By doing this type of strategy, you have the profit and you have your 5 bitcoins back completely. And you can also do this with small bitcoin you hold, settle down the word risk upon doing this.