Bitcoin Forum

So I did some research and got the basic picture about ICO, that is when an ICO starts, during its Pre-Token sale, it offers its tokens which we buy by sending the cyptocurrency that it supports to the crowdsale address. Then we get to store those tokens in a bitcoin wallet that supports the ETH-20 protocol, which is kind of the standard protocol nowadays.

What I do not understand, however, is what do we do once those new tokens that we got have a higher value? How do we sell them for BTC or any other kind of online currency, or maybe use those tokens?

what you do not understand is where to sell it right ?
just tell me where is the place that you said it has a higher value than before ?
you can tell me like that which mean that token already tradeable in every exchanger or some exchangers.
so just sell it in there,
but if it's based on Waves you can sell it directly on wavesdex.
other than waves,usually it's tradable on exchangers like Bittrex,Nova,C-Cex and even you can find it on Kraken,
for example Escudo if i remember it correctly,but it get delisted yesterday.

Oh so we basically sell those tokens on an exchange which is supported for those token right? Got it.

Yep.

Be very carefull when investing though. There are many scams around as there are many people throwing money around too easily nowadays.

Let's make it clear, Here ICO stands for Initial Coin Offering which through gather money from the investors to furthur development of their project. Being participated, any ICOs programs you must research by following their whitepaper and other materials.  It's very risky investment though.