President Trump’s social media company has moved one step closer to transforming itself into a financial services firm that intends to market investment products, including crypto, to retail investors.

Trump Media & Technology Group, the parent company of Truth Social, which has become Mr. Trump’s main online megaphone, said on Tuesday that it had signed a binding agreement with a crypto trading platform and a newly created Florida investment firm to launch a series of exchange-traded funds, or E.T.F.s, by the end of the year.

The move to market E.T.F.s to investors is part of a strategy by Trump Media to generate a more reliable source of revenues after failing to attract sufficient advertising dollars to Truth Social.

In the deal,…