The good thing is that you have alternative, you are not forced to use any kind of online wallet at all.
In case of even shadow of doubt you should not use online wallet, casino, exchange - basically any 3rd party service.
I just want to add - if you are user of blockchain.info, then it is near impossible for owners to steal your bitcoins - as they don't have access to your account at all.
I have been using coinbase.com cause I was suggested that it was the best. Is it the best or should I shift to some other one. Ya I read about it, it's scary it could happen. Will there be any fees if I switch to Blockchain?
Coinbase is a online wallet provider, it should be fine to purchase some coins from them but just remember that as soon as those coins have been confirmed and sitting in your coinbase wallet you should really then move them to an address in which you hold the private keys too.
Mycelium is a good option, blockchain.info is OK too.
It's often discussed that, Hyip, ptc scams are normal. What happens if the wallets like coinbase and xapo and others decided to walk away with the money what will happen, though I am sure it will never happen but just out of curiosity
it can be but i think with the official wallet nothing happened like this because the official wallets are making money through legit way og transaction so why they needs to scam .sonin my opinion they are no such chance to scam ( atleast for blockchain )
there is no "official wallet" for bitcoin. all the wallets are created on the bitcoin protocol by people and are all open source. those third party sites like coin base and xapo are running on their own code too but there is no such thing as official wallet.
and your reasoning is also wrong because the same thing was true about all those exchanges which were earning money through legit ways like trading fees but they scammed anyways.
There is official wallet for bitcoin and that is blockchain.info and we can't assure those big exchange or wallet providers if they are going to run with our money.
But it seems that trust of people is much more precious to them since that is real business so you don't have to think about and doubtful from them.
No you are incorrect, blockchain.info is not the "offical" wallet for bitcoin, there is no offical wallet.