Yes, growth in the available tokens will take time. They are reliant on chains adopting the IBC protocol, which is a time consuming major upgrade each chain needs to perform. Terra Luna is working on it, and that would bring stable coin (UST) which will add a lot of appeal.
The other thing that will help is when the gravity bridge to ETH is live. Then ETH tokens (pegged into the cosmos eco-system) will become available.
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