I started researching and investing in Bitcoin from February 2018, at that time 1 BTC was priced over 8k $, I bought 20BTC and then the price started rising. When looking at Bitcoin price charts in December 2017 I was very happy and thought I was lucky to invest properly! Then 2 months in March 2018, 1BTC was priced at over $ 11k, I was happy and decided to buy another 50BTC, I thought I would be a millionaire! But not! Then the price of BTC started to fall and I lost a lot of money! I was scared and did not understand why the price of BTC decreased! As well as buying BTC, I was fomo, invested a lot of money but did not understand what I was doing. Then I calm down and explore the market, and I realize that everything has its causes and rules! I started the trader and gradually recovered the lost money! I know a lot of people like me, invest their money without knowing what they are doing! I advise people to research thoroughly before bringing money to the market! And according to my personal opinion, the upcoming Bitcoin will drop to about $ 5k before rising again! invest your money wisely, it is your decision! good luck guys!
I think you made mistake in the past, you bought more btc when the price was going up in march 2018. When the price was rising, you should sell your coins because you may wouldn't have such chance again later in short time. Always play safe than greed, it will keep your portfolio in profit, not loss.