This year is the time to take risks ,the halving should press the market and the hard pumping at bitcoin should happen,dont be greedy and when you see a good margin take back your initial investment of 10k the rest you can keep or sell all at once ,the thing is if you dont invest now ,later the price should stay higher then now soo you will be getting less bitcoins and the moment to easy profit will be gone ,then will be a question of lucky to get the next waves.
It could happen when we are not taking an action now to invest we might not see a cheaper price again, but you should make sure you are willing to take the risk because we have witness the price has fall back many times so it should be an individuals decision as both could happen, but my stand is I will see another good price before the end of this year.
Fall backs of prices are normal in any kind of price movement of commodities. Anything you that has a price can be drawn in a chart in which you can use technical analysis. You will know where the support is in which you can buy it at a cheaper price and not worry when it will fall and sell it near resistance gaining instant profit. Buy and Sell can be good specially you have a good worth of money.