Additional security like what?
It is up to people to be responsible for their own money. It isn't up to a government to tell people how to manage their cryptocurrencies.
When the saying goes "Be your own bank" it also includes, and more specifically, the responsibilities that go with it. If they don't know how to protect their money, they shouldn't even be using cryptos.
7.5% is the average tax rate in this country for something other than their job (which is 23% according to this link) so nothing special about the rate since it's normal to them
Bitcoin was never banned I believe, and people could use it freely. So making it legal doesn't make much difference to them.
In fact, this news isn't really news at all, because there was a decree issued about three years ago saying much the same thing. So nothing new really. On the other hand, both are mainly about collecting taxes and regulating companies (so that they can collect more tax money)