Do you think I could use raspberry pi for bitcoin mining?
'coz it's cheap rather than the traditional pc or dedicated mining machines.
For mining bitcoins, this is not cost-effective, but if you start with pos mining and choose a suitable coin, then raspberry pi fits well here.
Examples of coins that are designed for pos mining:
Universe(uni)
Bitradio(bro)
ReddCoin(rdd)
DeepOnion(onion)
It will be possible to mine ethereum very soon, but you should have at least 32 coins.