The attacks happen almost to every popular site. Now in this crazy crypto bull run, expect lots of them, there's nothing much that can be done except being ready just in case it happens
DDos attacks were common but to know the fact that launching up this kind of attack isnt really a cheap one. Mentioned aboved that these attacks are mostly on front-end
and it has nothing to do with back-end or internal which i presumed safer than on that typical breach like wallets or storage of funds.
Yes, recently Binance often does not work the withdrawal of funds when there is some increase in the price of BTC or other currencies. What this has to do with is unknown.