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.
Despite the fact that prices for Bitcoin and Ethereum have already grown well in recent days, it is still profitable to buy them and hope for their growth. This has all the prerequisites, the market comes to life and begins to come into active movement.