It might be tempting to cash out when you see your stocks or cryptocurrencies mooning. Good profit right? Similarly when you see a 10-20% loss your hands start getting weak and your instincts call for selling. Things is, statistically, for the average folk, if you start trading you eventually going to suffer big losses. Trading advice is also (most likely) a scam like I mentioned in my previous post.
If you don't have a big capital, the best you can do is Hodl for the longterm. When it comes to the young market of cryptocurrencies — if you genuinely believe that the future will be build around blockchain technologies — a broad diversification (top 20 currencies) would suffice for you to retire in 10 to 15 years from now. The worse thing that can happen is for you to gain an overall 2-3% gain over your original capital. It is highly improbable for you to lose your entire capital. For that to happen the entire blockchain idea has to collapse.
At this point of cryptos, with that kind of market cap, you can't completely lose your money if you diversify on the top 20. Those are technologies with a backbone that breach wide even in the FIAT world. Even if half don't make it 10 years from now, you are going to see huge gains on the survivors.
No matter what is going around you, no matter how painful some days might be, hold tight. Patience is a great virtue and will pay out accordingly.