Investing sometimes profits and losses, all depends on our efforts. I don't hold a lot of bitcoin, because in the case of 2018 I was hit with a lot of altcoin tricks which until now the price was not the same as it used to be a dime coin. I regret why I didn't just collect bitcoin instead of buying altcoin which doesn't mean anything until now.
If you're holding those called shitcoins then just treat it as a lesson in crypto world. But if you're holding potential altcoins like eth, ltc or anything that is in the top 10 of cmc then don't be afraid of your holdings. I also don't have bitcoin right now instead I have ltc and etc. Though the price is very low right now I'm optimistic that they will pump soon.