Is botcoin really that bad? To banned by other countries?
Do the other government in other countries see something bad?
Can bitcoin be used to locate us?and see what we are doing? In short a Spyware.
No, Bitcoin is not bad.
There are many causes why Bitcoin is being banned.
Governments. The government are the one who are implementing the laws of country so it is expected that even if the people of that country want to have a cryptocurrencies in their country, if their government view cryptocurrencies as a threat then they have no choice but to follow that rule.
Banks. Banks has been here hundred of years ago and imagine if that kind of establishment will be erased just because of this cryptocurrencies, they won't let the bank reign end like that.
The cryptocurrencies itself. Because cryptocurrencies are not controllable, some are viewing it as a bad medium for currency and some are viewing it as an act of terrorism or a currency that can be use to supply illegal transactions.