If you do not conduct your due diligence before investing in small-cap altcoins then you definitely lose your investment. However, it can be highly beneficial if you take a calculated risk.How many people would have thought that companies like Google and Amazon would grow into the biggest tech giants during the early days of the Internet? Maybe the altcoin you want to invest will be very high in the coming years. So, here we are with the list of 3 best small-cap cryptocurrencies that you can consider worth investing for 2019.