I do not understand why you say Bitcoin is dangerous? After conducting many transactions with BTC, I find it very safe and secure. It is very safe to send the correct address. Sometimes there are cases where the wrong transfer of address leads to the loss of the number of transaction BTC due to its security. In the future I believe that BTC will become the future of the world, they will gradually trade with BTC and remove cash from their country, and the whole world will only have one currency that is cryptocurrency to pay for everything.