Bitcoin could be overpriced, Most of the altcoins are trading at very low prices compared to bitcoin, that means there is a huge potential for growth if you invest your money in it. For example, there are lot of altcoins which is trading near to 1$. If you invest in one of them, and in future if that technology succeed, there is a good chance that, the price could reach 100$ multiplying your investment 100 times. But imagine you invested in bitcoin now, its price is already at 4000$ if in the unlikely event that everything went well, then its price could reach a maximum 10000$ within 2 year, your gain? just around 2X.