@crypto.piotr this is certainly a great way to make the community discuss and learn. personally for me I haven't thought of the tip so far as an opportunity to buy and stock more coin. infact I have lost more than I have ever hoped for but this journey isn't just a year journey, its a lifetime journey.

on that note, the quiz got me doing some research and this is what I could come up with ;

2017 has seven correctional situations but 2021 has two so far. although the correction of 2021 in may is massive as it almost or equal to 50% of the BTC price. all in all this year has been a great one so far and with recent great news coming from south and west, I can say that this year will see BTC ending on an higher note

in summary, below are the figures by which btc dipped in 2017
Jan 2017: 1147 to 734 (36%)
Mar 2017: 1360 to 919 (32.5%)
May 2017: 2806 to 1913 (31.8%)
June - July 2017: 3000 to 2043 (31.9%)
Sep 2017: 4980 to 2975 (40.2%)
Nov 2017: 7898 to 5511 (30.2%)
Dec 2017: 19891 to 10400 (47.7%)

while for 2021, it has just been;
Jan 2021: 41986 to 28732 (31.5%)
Apr - May 2021: 64899 to 30000 (53.7%)