The biggest criticism of bitcoin is coming from those who have less knowledge about it moreover we experienced some spams doesn't mean bitcoin is not well protected.

However something you don't have knowledge of always seems difficult but bitcoin is one of the forum that will experience rapid growth in the near by future
The experts in the house can relate.

Yes!
The more secure way to protect your wallet is by storing your coins in cold wallet because it can't be easily penetrate by scammers