Latest projection: 607,431 (current block) + (22*144) = 610,599
So I need about a day of blockchain rewind due to a 51% attack to win. Or a large enough drop in Bitcoin price to make 5% of all miners pull the plug. I happily accept defeat over of those 2 scenarios

LoyceV, you have a big chance to win the competition. It might be better to say that you have the biggest chance of winning.
First block of December 13 (at CET) was just mined. The number was 607846.
The difference between first block of December 13 and first block of December 10 was 415. So, in these three days, 138.3 blocks has been mined per day on average.
If blocks are mined at a same rate in next 19 days:
First block of 2020= 607431+(22*138.3)= 610474
This block number will make you win the competition.
So you don't need a 51% attack.
