Yes, institutional bitcoin interest affects bitcoin positively. It will push up the price and it will make it less volatile. However, as we saw in news, many institutions enlarge their crypto holdings by also adding different coins such as ETH, BTC Cash, Litecoin. When Bitcoin becomes real digital gold accepted internationally, then other coins will get the chance to perform even better. The previous interest in Bitcoin will be transformed to others.
This is not a positive for everyone, in perspective it looks good because it pushes up the prices but considering that, it means that individual/retail investors is going to have a hard time getting in because it is an expensive thing to do. Hopefully, those things can happen and if there is no way to stop the progress, I guess the only thing that I can say in terms of this is that individuals who want to get in bitcoin needs to get in now rather than later where the prices is far more expensive.