When you do not invest money, it does not mean that the investment is "free": in any case you have to invest time, effort, work, capacity, and so on.
On the other hand, if you do not have money, work is the only way to enter the world of cryptocurrencies.
At work!
I really agree without a capital to invest in some currency does't mean you are always get them for free. Investing time, effort, work, capacity, and etc. to make money is the best way to be a part of Cryptocurrency and I think after that you can also make your own capital.