Yes it's possible!! Some signature campaigns pay about 0.09/month around with the avatar bonus which is more than 1 BTC a year. I'm talking about betcoin campaign.
Am also looking forward on how I will be able to earn 1BTC in a year. But somehow suggestions here are very nice that we can actually do this as possible.
Go for gambling and you can make it in a single day
just kidding if you are not in hurry to earn 1 btc per year then I would suggest you to start with signature campaign.haha it really ever happened to my friend, he get 1BTC in a single day of gambling.
he did very often make a parlay with high odds and at that time I think he's really a lucky day. where he made a parlay bet with the odds @1000 and bet 0.001BTC, then he won the 1BTC. he himself did not expect and quite regret that only bet 0.001