Here are three variations with different tones:

1. Casual:

If Bitcoin crosses $100K this week, I’ll send $1,000 in BTC to one random follower who likes this post. Let’s see what happens!

2. Formal:

Should Bitcoin surpass $100,000 by week’s end, I will award $1,000 in BTC to one follower who has liked this post.

3. Hype-Driven:

BITCOIN TO $100K?! If it happens by week’s end, one lucky follower who likes this post is getting $1,000 in BTC! LFG!!

#bitcoin $BTC