Although all posts are good advice, but i tend to disagree with most peoples opinion to a certain point.
having a smaller cc bike to start with may limit you a little, but it is still possible to hit 100mph on a kawi 250. i have had plenty of friends who started on these bikes and still did stupid things. Many of them would try some stupid stuff on these just because they weren't as powerful and gave them a false sense of being "more safe"
I have owned multiple bikes, and just because my R1 will do 160+ without thinking doesnt mean that i have to do it.
most of it comes down to responsible riding in my opinion. i have had just as many friends hurt themselves on small bikes vs larger cc bikes. seems it really just comes down to the rider.
The only think about buying a smaller/older bike is that if you happen to lay it down you are only out 3k instead of 13k.