Bitcoin is a conventional unit that you can buy and transfer to your balance, consisting of 64 digits known only to You. To storage and transportation do not need to have to carry in addition nothing to this password. Your accounts, apartments and cottages can be taken away by the court or the Communists can seize power, take everything, and in return give a room and drive you to work, but they will not be able to take bitcoin if they do not know that You have a password
Well not always , sometimes people do Invest in some offline wallets and such and the one's who know about this 64 digits , so called private key is those wallet's owner too.
You should understand that there is not one kind of wallet , there are online , offline , hardware and paper wallets mainly .
All of them do their bit to secure your bitcoins.
Bitcoins is more like transferring the money in the form of bitcoins from one party to another using block chain , which is extra secure network being used everywhere in this world.
You need network confirmations before you can actually get those transferred and those confirmations cause this lag between transferring money and receiving.
But we also have lightning network , it is an instant mode of payment being invented which actually takes fee power then ever.
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