Not really. Where else is that money going to go? It's not enough to just say there is a disincentive, you have to show that the disincentive is so great that it makes other opportunities more attractive. But those other opportunities don't exist, because it is a wealth tax, it doesn't matter what instrument you use, the tax will still hit you.
Also, those numbers are pretty much non-sense in today's economy, with inflation consistently below 2% and nominal capital asset growth being closer to 10%, a 1% wealth tax represents a tax rate of ~12.5%.
I'm not losing sleep over a startup founder who owns so much of a company to be worth over $100MM on paper or otherwise. Startup founders have the ability to sell a part of their shares in liquidity events. If they choose to hold onto their shares above all else, it's on them to figure out how to pay the tax. It might even create a whole new financial instrument or class of investments.