Howard Marks Sounds the Alarm on Tech, Cryptocurrencies and Private Equity

``Current valuations of Facebook Inc., Amazon.com Inc., Apple Inc., Netflix Inc. and Google parent Alphabet Inc. generally represent at least 30 years of their current earnings, and Marks wondered if that's sustainable. He acknowledged the group are "truly great companies, growing rapidly and trouncing the competition (where it exists)," but also noted some are doing so with profit growing slower than revenue or with little profit at all.'' -- Note, of course, that he admits he doesn't understand cryptocurrencies (that doesn't mean they aren't bubblicious, of course).