Howard Mark calls bitcoin a pyramid scheme.
Reading lot of different prespectives. There are number of thoughts that are in favour and against digital currencies ( CRYPTOS).. i Personally like to absorb genuine and logical criticism even though it may go against my current belief.
Might interest you:
Check this article:
Source:http://www.zerohedge.com/news/2017-07-27/digital-currencies-are-nothing-unfounded-fad-howard-marks-calls-bitcoin-pyramid-sche