Preach! Governments and banks fear crypto currencies because it's money from thin air! Banks fear it because ot means less will be investing on them and more on crypto currencies. Governments fear it because aside from banks controlling them, which they are, crypto currencies have no taxation laws yet aside from income taxes.
yes sir they are scared of losing clients. their clients would be aware and be wise and might choose bitcoin over them. but personally i think not everyone would do such, there are still people who trusts bank even more.