If you follow the link youll see also ETH and all major alts are considered.
Yes, they were also considered. April is over, and we see that it managed to bring positive changes to many cryptocurrencies, including Bitcoin. I think it was bullish this month, surely.
Bull markets are surely rising as we have seen high growth even today and in the coming months we can see more and more peoples investing into cryptocurrencies. This is turning a good source of investment for even those peoples who are not that into the field of cryptocurrencies so the number of investors is in the ascending manner which also makes the investors invest into coins which are most popular like ETH, Ripple, etc.
The markets have started growing and we can at least see bitcoins crossing $15k by the end of this year. The amount may increase as per the new investors getting into the field. What it think, is that also the community from the stock exchanges should invest into cryptocurencies which will surely make the volume much more higher.