BTC @ $50k by end of 2021 would suit me very nicely ;)

I'd be more conservative and say around $30k, so making all time highs but not yet getting near the very optimistic projections. By 2030 we should be talking about $100k. The only question is how strong are your hands, and what is your timescale for selling out?

I like your top 5, but I'd substitute ETH for TRON. Also take a look at LINK - its a key part of crypto ecosystem and will play nicely with BTC and smart contracting platforms.