I hope that the OP really went ahead with his investment plans. Had he invested $10,000 (as he had mentioned in his post) five months ago, then by now his investment would have grown to $19,000. Is there any other asset out there, which can give you 90% returns in such a short duration? And the attractiveness of Bitcoin increases, when we notice how over-priced the other options have become (stocks, real estate.etc).
You are right, such assets are quite small, and thus the crypto market is attractive. However, not everyone can correctly determine the threshold for entering a cryptocurrency, because many have invested in Bitcoin and in the fall, when it cost 6,5,4.