When you are investing in any cryptocurrency and not necessarily the crypto-currency that we are speaking about her it is necessary for you to be very patient because the cryptocurrency market is very volatile and therefore you have to be able to step back and wait until the price shows a profit before you actually sell the coin that you are interested in.Polkadot is one of the best crypto currency to hold in the market at the moment. However, the market is still in it's bearish downtrend so investors really need to be patient with the coin and every other coin for now