Tesla is working aggressively to address 15 trillion dollars potential market (ride sharing, vehicle market, freight transport, energy generation, energy storage, content, and a few other things down the road).
I see every indication that Tesla will take at least 30% of the markets with overall 10% net earnings. Also it's highly likely Tesla will buy back 40~50% shares down the road like Apple did in recent years. 15T X30% X10% at P/E of 10 gives a market cap of 5T. Total number of shares at 100 million after 40% buyback. 5T/100m = $50,000 per share. Not saying it's my target, it's conceivable TSLA could go as high as $50,000 in 10~15 years.
I discount the target to $8k because nothing is 100% sure.