1. Starting today on April 10, 2021 if I invested 150k in bitcoin, how much do the gurus expect me to have in 1, 2, 5, and 10 years? Like would any idiot who just invested today and didn't sell expect a 5x increase within the next 10 years?
Yes, sure. Most of us in this forum believe that Bitcoin will be much higher than $300k in the next ten years. If you stay for a while in the forum you will see it and will see the reasons why. There are also many people who have had Bitcoin for a long time, and have multiplied their holdings by much more than 5X.
2. I would use dollar cost averaging, but over what time horizon? Invest 150k over the next six months? Or just invest it all today since we all know it's going up?
DCA is simply to stay calm. If you can psychologically withstand a sharp drop in the market, better lump sum, if not, DCA.
3. I could withdraw the old retirement fund and get the initial investment up to 300k. Would you go all in using that? I would not have much of a backup plan for retirement if this is the case, but like I said I have a high risk profile. I do believe this is once in a lifetime.
Not at all. If you hear Michael Saylor, you will end up doing that and taking a mortgage on your already paid for house to invest in Bitcoin, but I think you have to apply a precautionary principle and diversify, no matter how much most of us here believe that Bitcoin will remain the most profitable asset over the next decade.
4. If I want to pursue some alt coins, and again, I have a high risk profile, what % mix would you recommend? 33% alt-coins and 66% bitcoin, or 50-50, etc?
Fuck shitcoins! If you want to diversify a little, put like 90% in Bitcoin and play roulette with the other 10%.