Due to the rapid rate of change regarding smart/contracts & DeFi, most likely there will be things in 5-years that you didn't even think of today. What I can tell you, is BTC dominance has been trending downward over the years. There is a little inflow back and then when markets panic, but the over-all dominance of BTC decreases over time.
Bitcoin’s volatility is both its charm and its challenge. It’s not a traditional store of value or currency but more like digital real estate. With ETH having nearly 10 times the supply of BTC, it’s unlikely to surpass BTC in price per coin. Options trading can be tricky with all the fees, so I prefer trading the underlying asset for swing trades. I learned the hard way with my BITO trade, losing $20k before breaking even. Sometimes, sticking to simpler strategies can save a lot of stress and potential losses.