Not only DOT and XLM. There are other very promising coins as well.It all depends on their development. If they are traded more than others, this will happen.
Yes, and for now there are some very promising Altcoins such as Qtum, Cardano, Doge, Ethereum, and TRX, all of these tokens are already at very fantastic prices at this time, and the potential to increase again is also very open.