I think you'll find that this general topic has been discussed into the ground around here. And really, its for good reason. Bitcoin is definitely becoming a lesser-dominant cryptocurrency, especially when so many are being developed and started as we speak. You've got high and slow transaction fees, high competition to Bitcoin and a growing investor interest in these altcoins. I wouldn't worry too much about it now however, with bitcoin still maintaining itself as the cryptocurrency with the largest market cap - with that rising. If we see competition such as Ripple take over - that's when we'll know we'll be in trouble.