Any links for these claims or it's the usual hype to the moon non-sense?
None. Just my personal speculation and my stellar track record.
I said weeks earlier that doge and LTC would be pushed mainstream and soon after that CheapAir added them via BitGo. This is why doge is rallying - people are now realizing what I said all along, that doge will be pushed mainstream along with BTC. This then means BitPay, Coinbase, etc are a done deal.
The reason I knew this is that Bitcoin will go mainstream next year but its transactions are way too expensive and when volume picks up Bitcoin will not be able to handle the transactions size.
LTC and doge [together] solve the tx volume and high tx cost issues for Bitcoin.