I'm only going to address point 10 because it kind of makes everything else redundant.

Anyone that still believes bitcoin was invented by innocent minds, for the good of the people needs to check the whole of history to see whether there is any prior evidence of powerful people trying to stack the game in their favour. I'm sure you won;t have to look hard

Now I'm not saying categorically that it isn't, I'm saying the odds are against it. So if BTC is masterminded by the (govt/rothschild/illuminati/some other rich guys) then we can assume the price increase is equally as orchestrated. The copycat coins can copy so far, but ultimately only BTC has the backing to push it over the top. The others will always remain small players. The people who invented bitcoin invented it the way the did for a reason, what you describe as weaknesses are design features. There isn't the slightest chance 'they' are going to let a competitor that doesn't have these desirable features supercede bitcoin.

I'm not one of the guys in charge, so my optimal strategy is play the odds as best I can, and hedge black swans. My investment in BTC is already hedging the black swan. I haven't bet the farm, if BTC fails I'm largely whole and ready to play the work hard(ish), enjoy life, retire comfortable game. If BTC succeeds the retirement is just a bit sooner and a bit lusher.

Hedging the black swan that $[altcoin X of N] is the one true god feels more like a lottery. Like buying a basket of penny shares and hoping one hits big. I'm not saying don't do it (I got a few, a surprisingly high 20% of my total crypto when i figured it out - might need to adjust that!) unlikely any of them will (be allowed to) usurp bitcoin imho.