Fans want Mbappe and Haaland signed and a quadruple every season.
It's down to the decision makers at the club to be clear eyed and make sound decisions for the long term health of the financial and sporting project. Brighton is selling their best players while progressing every year, Spurs once upon a time had a chance but failed to consolidate themselves with the right level of investment and now you have to go back to the drawing board. By keeping Kane, Levy is hedging the future of the club on the unlikely event that most competitors shat their pants again next season. You said you are worried about relegation next year but it's more than feasible that Spurs can find themselves in one soon if Kane leaves for free and the squad is not adequately refreshed. You still have Lloris in goal, Eric Dire, Sessegnon, Moura, Emerson Royal, Lenglet, Porro, Sanchez, Sarr, Tanganga, Bissouma, Danjuma on your team, that's a lot of crap/utterly mediocre players. They need to be replaced, and not for cheap considering the current market. And Kane himself.