It's certainly possible to start from effectively "nothing" and make it, of course. But a bit of money, to begin with, is going to help. Particularly later on as most people get into trading and before they start making money actually lose all of it and then have to start again, lesson learned. So I would say have some money saved up to get in and then for later on, just in case.
Correct, besides it is not like we need a fortune to start our adventure on cryptocurrencies, if you have some hundreds of dollars that can be enough to start if you combine that starting capital with what you earn you will soon have enough to invest in some icos or to trade if that is your thing and from that point on it will depend on your skill to make your capital grow.
it is possible of course to start everything from scratch, took part in Bounty companies. Thus, you will earn starting capital, which can then be realized in investments or in trade.