We do not the percent of your losses. If you have more than 80% - so just hold. You loss a lot and to fix this losses is not very correct. You can wait at least little market rising, and only than sell with small losses. But if you only have -20% now - so sell and do not think. Market will go a little deeper soon and you can buy more alts to your portfolio. But the best way in crypto now - not to buy alts and hold Bitcoin)
That is right. There is a fall of more than $200 from what the value had been yesterday. This means you should not sell coins and should rather hold. But sometimes the fall is just momentary and one should focus on their business plan despite being deviated by the market. In the same way, the technology is spreading slowly and is being recognized by some more countries so it will lead to a considerable rise in the demand for the coin as well and the future prices will be much higher than the current market prevailing price.