also there are giveaways happening all the time.
I contradict to your answer. You can't say minimum is any amount. Being a serious trader if you invest $1 do you think you could make any big? Choosing adequate amount is essential step in trading process. I suggest strata-division of investment. Before starting investment, investor must wisely divide investment into 4 fragments. Then invest first 2 parts of 25% each, one in risky coins and other in big coins. Then on the basis of result of first 2 parts, further invest rest two parts.
We can’t invest into any coin at mere liking and disliking or emotions. The detailed study of coins and smart distribution of investments is mandatory to win the game.