Investing in different coins hello allow you to get profit on regular basis, because if you invest only in single coin you have to wait for the rate to increase a but if you invest in different coins you don't have to wait for more, because our of many coins some price may increase and you can get profit from that.It is no doubt that bitcoin is heading to $20,000 and above before the end of the year base on the realities available but it comes with higher transactions fee. I feel Investing in other coins like litecoin, bitcoin cash and ripple will be a wise decision.since they are also on the rise too though not as high as bitcoin.