what does that mean by legalization ?
are you saying about it's legally used ? in every country you can buy something and pay it using Bitcoin.
as long that store support it,
no matter what is it,if they do not support it you can not buy it at all.
if you're asking about global legalization in some country,that mean Bitcoin should be regulated first by them.
and we can talk about global legalization,
but right now,if they did not ban it.you can use it as your wish,but the requirement is the store support it.
Partly you are right.
Nobody forbids you own digital property. For example, an account in the Second World War and gold in it.
But is it legal to accept payments in bitcoin? This is different. From the point of view of business, everything looks different. You must report to the counterparts. Make payments, make deposits, etc. And there are limitations to these operations.
Therefore, owning bitcoin and using it is not the same.