BTC is not worth investing in truthfully.
Even if you bought 500 Bitcoin at $500 and Bitcoin were to reach $1,000 in the next 6 months(which is very unlikely without Mr trading bot willy), you'd only have make double your investment...
In Altcoins you can put in $100, and then the coin goes up 50x within the next 2 months, and youve made $5,000 off that original $100 investment..
Bitcoin is useless for investing in...from an investors perspective.