etherium to bitcoin

Does anyone know why? I see also a few other altcoins which have increased dramatically in the growth? Is it because people are tired of bitcoin and the high fees?

I just found the website https://changelly.com/ which seems to be reliable and to be able to Exchange cryptocurrency to other crypto. This is exactly what I was looking for but I don't know if this service / website is reliable ot just some trash?? Anyone with first hand experience or link to...