Bitcoin is rock solid long term investment. Though it may be high volatility right now but you are assured that price will recover immediately after the dip. It's been bullish for quite sometime now because of wide adoption and going mainstream. Though there is some disadvantages in bitcoin like network fee is high and transaction speed is slow...workaround is to pay more network fee to get prioritize but with all these it seems it is still the crowd favorite. It's because of its stability and rock solid and lots of room for higher price. Overall it's still the best and secure investment for you.