I am not a nexo coin holder. Nexo will add a tiered system in December to increase earnings if your assets over a threshold and if you agree to lock up you assets you get another little bump in earnings.
Now there is an option to buy nexo through their site using Bitcoin but the easier approach is to buy nexo on Bitrue exchange. They are an xrp friendly exchange and offer nexo pairings.
Personally I always felt that I would rather load more on xrp and earn less on interest because if xrp skyrockets, that will automatically increase the earnings potential. However over the past year or two, it was nexo that has gone way up and the users made more if they held the coins.
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