It's very risky to sell a property like a land for bitcoins. But it is indeed that now is the best time to buy some bitcoin because today's price is considered low. Like others have mentioned, don't sell it yet due to panic, of course wait for the right time until the price rockets high, even though in the end of the year or next year, just dont rush.
For me it's not reasonable to sell your property inorder to buy bitcoin. Come to think about it the the value of land will appreciate and it is one of the biggest and stable investment you should have. Though it is the best time to buy some btc but make sure to make use of the resources that you only have and what you don't have.