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 $4k and which is why altcoins are overpriced in term of BTC. Now that BTC has gained price, altcoins price has decreased in term of BTC and now is the best time to pick your favorite altcoin because right after the BTC ride, altcoin will also follow the trend.
BTC already broke the latest resistance near to the 5000$ but there are so many barriers in front of BITCOIN's price. In terms of price, we need at least 2000$ more for testing the next level of resistance.