Yes you can! Simply deposit Bitcoin to your Bake account - see where you find your deposit addresses in this article.
Once your deposit is confirmed, you can swap your Bitcoin into any of our staking coins (See our coins HERE. Please note, swapping from BTC to ETH is currently not possible)
The most recent exchange rate will be shown on the website right at the coin swap.
Please note that
Rewards will be paid in the native coin you swapped your BTC into automatically (Dash, DeFiChain etc)
Once swapped into staking coins, you cannot swap back into BTC, funds will stay in the native coin
For more information about Staking, please check: What is Staking?