I dont believe Bitcoin will be affected by ICOs if they crash.
BUT that said Bitcoin is the one thats skyrocketing not ICOs (whilst huge investments gone into ICOs there fairly dormant at the moment being overshadowed by Bitcoin) and people away from this forum who have no understanding of Bitcoin are the ones Chinese whispering about how there so much quick money you can make and they should jump on the hype train. Your average joe isn't buying into ICOs in the same way with Bitcoin. Media is focusing on primarily on Bitcoin and the unbelievable growth and money making opportunity. Your average joe isnt thinking oh TenX, Neo, Lisk blah blah there thinking Bitcoin.
Early investors of bitcoin fuck yeah go you guys your going to be fine just hold on long term as it will continue to grow to new heights in the next 10 years, you got yourselves a great entry into the market early on!
Newbies looking to invest now id be very cautions of getting wiped out short term and waiting a long time to recoup your potential losses. Nothing lasts for ever, history repeats itself, dont be blinded by money signs and whilst there is great value to Bitcoin there is also alot of volatile hype right now. I know alot will disagree that Bitcoin is in a bubble and will have a dramitic drop at somepoint but perhaps we can agree long term bitcoin will be of a higher value that it is today. Entry is everything in market trading and jumping in now seems quite risky.
I think its alot easier to get bitcoin than it is to learn and buy into ICOs. I think Bitcoin is the bubble but yes there are trashy icos out there still.
I think you should be very careful if investing at this time and use this great forum to collect as many opinions to form your own. If bitcoin crashes all those ICO/BTC prices are going to surge up. Theres not much of a crash for ICOs to currently really have, more Ethereum with the majority of ICOs being built on its platform but again its relatively cheap and lightweight still in comparison - everything being kept relatively low by bitcoin and its hype.