You really shouldn't worry about that, what you should be worrying about right now is how to properly secure your coins and make sure that they are safe to hold for the long term. Once you do that you shouldn't have anything to worry about. Your balance is not going to be empty in the future, you just have to be patient and hold the coins for better prices.
As long as you are not selling your holdings and keeping it safe you will never be empty.
If you want to sell the coins or token you have then that is the sign of losing money.
December 2017 was the time where all cryptocurrency (almost all) are gaining its value and as you said you bought that time.
You were a victim of hype and now the value is really alarming, dont get into panic mode and keep holding on.