Invesco has filed for an exchange-traded fund tied to the spot price of Solana, according to a regulatory filing on Wednesday, as asset managers push to tap opportunities beyond bitcoin. The crypto industry has surged on a wave of optimism over the past year, helped by the Securities and Exchange Commission's approval of spot bitcoin ETFs and hopes of friendlier regulation under President Donald Trump. But while bitcoin goes mainstream, companies are now seeking to capitalize on the surging popularity of altcoins — which include all cryptocurrencies other than bitcoin — as investors hunt for the next breakout ... (full story)