judging by the fact that currency pairs are built from several cryptocurrencies, such as, for example, Ethereum, Ripple, Monero and others, then yes, I assume that these are serious and authoritative cryptocurrencies.
by the way, diversification into strong cryptocurrencies is a strategic movement designed to get higher returns. I am a little familiar with the trade, so I know some of the chips.
pay attention also to the fact that the standard bitcoin-dollar currency pair is chosen. Do you think it is really standard and brings the greatest profit or are there other explanations for this?