Well: "you can earn $1000 or even more $$$ worth Cryptocurrency per month without a single dollar investment"
Earning that much on steem without investing anything is not that easy. You for example invested a little bit on your posts and you still have a long way to go until you earn $1000 per month here xD
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Equally as important if not more so is the time spent posting for a month. Is your months time only worth $1,000 bucks? For a months worth of posting if in fact you can sell all those coins/tokens hopefully you will receive, which in itself will be a challenge. The time to convert the coins/tokens to cash is also an expense.
I agree with you. First you have to have the money to invest in the first place.