At present BTC prices are back down at a price of $ 7800 and if you have confidence in the increase in BTC prices in 2019, you can buy them, from my experience in 2017, BTC prices reached $ 10k in October 2017 then increased high at prices on the month December, now the altcoin price has shown an increase and if you buy in bullish, make sure you do research to get price predictions in the following month