I bought a bunch BTC when it was $17000, then bought a bunch when it is $14000...then the price dropped until 2 days ago. I bought a bunch again when it was 6000ish...haha, now the price went up...so, really, when is it a good time to buy? When it dropped for a while and it rose a little bit, then drop again, then buy?
So let's do a quick analysis of your trading strategy. You bought at 17k, probably during the euphoria, which wasn't a bad move, as long as you watched the market and waited for 2 confirmations that we won't be breaking 20k. The first one was on December 17 when the price went 2k down from the ATH and stopped above 18k USD. Most people were holding back then and decided to wait and see for the second move. It came on December 19 when it dropped to 17,5k and this should've made your bells ringing. At that day you had a chance to sell with 1k profit per coin.
I don't know why you chose 14k as your entry point, it wasn't a resistance. 10k or 9k looked like really good entry points. 14k not so much.
If you want to trade you have to either choose day trading, where you do a number of small trades every day and at the end of the day go back to fiat and count the profit, or you follow your own or someone else's TA and try to go long/short depending on the prognosis.
The most basic newbie advice is:
Don't overextend. When the price hits your entry point, sell.
Don't catch the falling knife, wait until it stabilizes at a given price. Predicting if the support holds or breaks during a panic sell-off is very risky.