JP Morgan’s recent optimistic forecast regarding the SEC's decision on Bitcoin ETF filings has elicited various responses from crypto experts. While some see this as a positive step forward, backed by recent court rulings, others remain skeptical based on the SEC's historical decisions and concerns over market integrity and investor protection.

Eitan Katz, CEO of Kima, suggests that while the recent court ruling might affect the SEC’s viewpoint, it’s uncertain if it will address their long-standing concerns. With the growing clarity around crypto regulations globally, 2023 may mark a shift in the U.S. regulatory approach. This sentiment is echoed by Simon Schaber of Spool DAO, who believes that the recent legal outcomes against the SEC might indicate a change in the regulatory landscape, suggesting it's more a question of "when" than "if" for Bitcoin ETFs.

However, others like Motti Peer from ReBlonde are more cautious, referring to the SEC’s previous reservations. Peer mentions Bitcoin's susceptibility to market manipulation and predicts a short-term market disappointment. He anticipates a market recovery, aligning Bitcoin's trajectory with other assets once interest rates drop.

The wider implications of the SEC’s decision, be it approval or denial, remain the subject of much speculation. Sigal Biran-Nagar of GK8 sees the ongoing adoption of digital assets by institutions, regardless of the SEC's decision on this particular ETF. Meanwhile, Katz believes that while an approval might positively influence the crypto market, its effects might not be immediate. Investor demographics are also significant, with Peer suggesting that spot ETFs could attract the general public more than futures ETFs, which might appeal more to accredited investors.

In conclusion, while there's no clear consensus, these diverse perspectives point towards the importance of regulatory clarity and the potential benefits of integrating crypto into the traditional financial landscape. The SEC’s decision will undeniably shape the future of Bitcoin and the wider crypto ecosystem.