The market is down and fluctuating at this time due to market cap going down and it might not seem profitable to trade now but believe me it's the best to enter the market now as prices are down and you can invest the amount and when everything comes under control them enjoy the benefits. Just hodl the coin long term and don't change your mind by selling early. Btc and ETH are good choice for this year and will reach good marks at last year. But you can choose your own coin.