While that sounds logical there's two problems with it.
a) 100 years is a hundred years, and that's a long time, even for a vampire, especially a new one. If I need money now, i can't wait 100 years
b) 100 times $10,000 is a million. A young vampire needs to have that first.

Generally speaking the criminal activiities are used to get short-term cash, right now, and to get the starting capital for these long term schemes, that they eventually set up.