A version of this article appeared in CNBC's Inside Alts newsletter, a guide to the fast-growing world of alternative investments, from private equity and private credit to hedge funds and venture capital. Sign up to receive future editions, straight to your inbox. Fears of rising defaults and a systemic crisis from private credit don't reflect the underlying fundamentals of private loan portfolios and returns, according to Blackstone's head of private wealth. A wave of redemptions is causing