If you take a look at the 2 charts and do some math,
2013/2014-15
10.30.2013 Btc about 200 usd
11.30.2013 high of 1166
12.19.2013 crash to 560 (48% of 1166)
1.6.2014 back to 1007 (86% of 1166)
4.11.2014 crash to 351 (30% of 1166)
6.3.2014 back to 669 (57% of 1166)
7.1.2014 18% decline then rise close to 669
1.14.2015 a long crash to 170 (14.6% of 1166)
2017-2018
11.18.2017 Btc about 7400 usd
12.18.2017 high of 19891
12.22.2017 crash to 10776 (54% of 19891)
1.7.2018 back to 17252 (86% of 19891)
2.6.2018 crash to 6000 ( 30% of 19891)
2.21.2018 back to 11777 ( 59% of 19891)
3.6.2018 21% decline then rise close to 11777
in 2-3 months ??? a long crash to 2904 ??? ( 14.6% of 19891)
I used coinmarketcap.com numbers for 2013-15 and bitfinex numbers for 2017-18.
Someone is drawing a similar Bitcoin chart like in 2013-15. Even the percentages are similar. But the time it takes to go from local highs to local lows has been reduced.
May be Charlie Lee's warning was right.
https://mobile.twitter.com/SatoshiLite/status/940353265585160192
With that in mind, it is possible that some cryptos may not fall in price like Bitcoin.