Depends.
it is too little to make it a self-dependant business venture. Point. Imagine you are good and make 20% per month....
....welcome to USD 1000, and out of that you have to live and grow the account. In my planning that would mean living of USD 250. NIIIICE.

NO WAY.
Add another 45000 and that would mean living of USD 2500 a month (assuming same profit, which - give that - is not that easy, especially for a starter). Now, who are you? For me living of USD 2500 a month is two steps backward. For some it is good. But then.... by that plan my account would grow by USD 2500 per month, too (25% of returns stay), I would hae USD 2500 a month to "invest" (pay credt on appartment back, invest in bonds or something to build a reserve) and would have some funds to pay costs (last USD 2500 are for taxes and trading costs, like internet, and my taxes would be USD 1900 on USD 10.000 profit, again depends on your country). And I do not need money to live from that.
That said, USD 5000 may be goood to start. Make sure you stay out of big deals and go with the smaller stuff - few shares if trading shares, mini futures when possible. It is a good start to "see how it goes", but it is definitely not enough to make a living or make it a worthwhile business venture
