Bitcoin is being worthy since the day it was launched but almost everybody think that it's a stupid idea to invest in bitcoin. But what now? Those who believed and invest before were already very wealthy people now.
It's always good to have since its the main crypto ,that most of the ICO they depend more in BTC and ETH that when this two dump,almost all coins dump too. So recovery is always possible in established coins.
It is also near low of 6k so I would say should keep buying on every dips. One should be investing every month from their savings so that they can build a good portfolio for the long term or sell out when the market is high or you have achieved you price goals.
Besides buying more coins, try to multiple the coins you bought even at current situation. Set a less percentage threshold on profit. Go for a day trading, have multiple transactions, try to have minimum $10 turn over on each cycle.
Buy coins with less values and start your day trading first, then as the capital increases, go for a coins that need a big amount. This is another way to gain profits meanwhile waiting for a huge hike.