Sell on Dec 31st and Buy on Jan 1st for Taxes?

I got into BTC in Nov, I'm in for the long run. I put in 15k, nothing gigantic, but a good amount for a first time. I'm currently down about 3k. I don't care, I'm in for the long run. But I was wondering, should I sell on Dec 31st 11h45 PM and buy back on Jan 1st 12h15 AM to take my 3k lost home for the taxes?

I live in Canada and I have a good enough income that this portion of my salary is taxes around 50%, so we are talking about a potential "easy" 1,5k.

Thoughts?