I know many will say the time ended, we must have bought before 15 days but I think this is the best time. Before couple of weeks ago, BTC was around $4k and which is why altcoins are overpriced in term of BTC. Now that BTC has gained price, altcoins price has decreased in term of BTC and now is the best time to pick your favorite altcoin because right after the BTC ride, altcoin will also follow the trend.
I assure you that it is still not too late to invest in Bitcoin and other coins from the top 10. Now is the time to start investing in the crypto market. We saw that the fall in prices stopped and growth began. Believe me, soon we will see a strong revival of the market and the growth of many coins.