If past patterns play out, the whales will lock in profits by selling 1/2 on launch driving the price down. The only thing I'm unclear on is where to buy once mainnet launches. What would become of OpenLedger's EOS on Bitshares? I'm not even clear where to go to check EOS balance after the launch. Nobody has said "this is where you go", but they all say just check your ETH address, but it won't be there come June 3.
I bought a small amount a few days ago and tested the Bitshares OpenLedger transfer and it took 5 hours for the transaction to show up. So I'm not sure I'd want to repeat this just before launch since there's a chance that the ETH network might not be able to handle the traffic at the last minute. It's an extra risk if the price drops to something like $0.50, I might be tempted to buy.
I was looking at EOS when it was about $0.45 on Bitshares last Sept, but the Bitshares wallet wasn't stable until I figured out that Firefox was the only stable one on my mac. By then the price had jumped to $4.00.
They say that only 33% have actually registered their EOS to an ETH address. NS James seems to have a solution for those using Scatter to generate EOS keys for those who forget, but it's better to be proactive. I was extra paranoid and used an air gapped machine to generate the keys. I've dealt with more than my share of hackers in the past because of my work in the software field.