Are there any other ways to buy bitcoin ?

Yes, there are some other ways too, 

1. Bitcoin ATMs - it is just as the traditional ATMs which in this case uses for bitcoin transmissions. 
2. P2p exchange - peer to peer exchanges, which means unlike anonymous buyer-seller connections, in this method, it is a direct connection between users. Local bitcoin is the best example of this. 

Let’s have a quick look with the steps : 

1. Set up a wallet 
2. Open an account at the exchange
3. Choose a purchase method