How to avoid disappointment?dont expect anything but study and learn it so you will not be disappointed to what you invest. Bitcoin or cryptocurrencies is risky so iys up to you how to manage and handle it.
All the investments are risky so we should not blame the Bitcoin and altcoin, stock investment and forex trading also difficult to predict so experience is the only key of any industry and If they confident in crypto platform surely anyone makes profit. I hope next year everyone believe this platform.